# MCP tool reference 1 callable tools. Use tools/call at https://mcp.schedulerzero.com/mcp with the exact tool name and arguments below. The /tools/ paths in this view are documentation identifiers, not HTTP endpoints. Request execution is disabled for this reference. Inputs are shown for personal API keys (bound) and for OAuth/delegated agents. Output schemas describe MCP structuredContent: native objects pass through; arrays, scalars and null use a data wrapper. Text content retains the native JSON result. [Connect a client](/mcp/connect) · [Authentication and authorization](/authentication) · [Generated auth guide](/auth.md) · [Download tool catalog](/mcp-catalog.json) · [Agent documentation](/llms.txt) ## inspect_campaign Inspect a campaign's bounded projection and step summaries without sender credentials. Use first to learn the campaign's status, version, and step shape before validating or launching. Step content bodies and sender internals are never returned; do not probe for them. Scopes: campaign:read Risk: read; confirmation: none; idempotency: none. ### Input schema (personal API key) ```json { "type": "object", "properties": { "workspaceId": { "type": "string", "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$", "format": "uuid" }, "campaignId": { "type": "string", "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$", "format": "uuid" } }, "required": [ "workspaceId", "campaignId" ], "patternProperties": { "^(?!(?:workspaceId|campaignId)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "workspaceId", "campaignId" ] } } ``` ### Input schema (OAuth / delegated agent) ```json { "type": "object", "properties": { "workspaceId": { "type": "string", "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$", "format": "uuid" }, "campaignId": { "type": "string", "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$", "format": "uuid" } }, "required": [ "workspaceId", "campaignId" ], "patternProperties": { "^(?!(?:workspaceId|campaignId)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "workspaceId", "campaignId" ] } } ``` ### Output schema (structuredContent) ```json { "type": "object", "properties": { "campaign": { "type": "object", "properties": { "id": { "type": "string", "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$", "format": "uuid" }, "workspaceId": { "type": "string", "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$", "format": "uuid" }, "name": { "$ref": "#/$defs/ShortText" }, "status": { "type": "string", "enum": [ "draft", "active", "paused", "archived", "completed" ] }, "pauseContext": { "anyOf": [ { "anyOf": [ { "type": "object", "properties": { "reason": { "anyOf": [ { "type": "string", "enum": [ "manual" ] } ] }, "pausedAt": { "$ref": "#/$defs/UtcDateTimeEncoded" }, "source": { "anyOf": [ { "type": "string", "enum": [ "user" ] } ] }, "evidence": { "type": "null" } }, "required": [ "reason", "pausedAt", "source", "evidence" ], "patternProperties": { "^(?!(?:reason|pausedAt|source|evidence)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "reason", "pausedAt", "source", "evidence" ] } }, { "type": "object", "properties": { "reason": { "anyOf": [ { "type": "string", "enum": [ "bounce_threshold" ] } ] }, "pausedAt": { "$ref": "#/$defs/UtcDateTimeEncoded" }, "source": { "anyOf": [ { "type": "string", "enum": [ "system" ] } ] }, "evidence": { "type": "object", "properties": { "thresholdPercent": { "anyOf": [ { "type": "number" }, { "type": "string", "enum": [ "Infinity", "-Infinity", "NaN" ] } ] }, "bounceRatePercent": { "anyOf": [ { "type": "number" }, { "type": "string", "enum": [ "Infinity", "-Infinity", "NaN" ] } ] }, "sentCount": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "bouncedCount": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "recipientBounceCount": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "senderBounceCount": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "unclassifiedBounceCount": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "scope": { "anyOf": [ { "type": "string", "enum": [ "campaign_lifetime" ] } ] } }, "required": [ "thresholdPercent", "bounceRatePercent", "sentCount", "bouncedCount", "recipientBounceCount", "senderBounceCount", "unclassifiedBounceCount", "scope" ], "patternProperties": { "^(?!(?:thresholdPercent|bounceRatePercent|sentCount|bouncedCount|recipientBounceCount|senderBounceCount|unclassifiedBounceCount|scope)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "thresholdPercent", "bounceRatePercent", "sentCount", "bouncedCount", "recipientBounceCount", "senderBounceCount", "unclassifiedBounceCount", "scope" ] } } }, "required": [ "reason", "pausedAt", "source", "evidence" ], "patternProperties": { "^(?!(?:reason|pausedAt|source|evidence)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "reason", "pausedAt", "source", "evidence" ] } }, { "type": "object", "properties": { "reason": { "anyOf": [ { "type": "string", "enum": [ "unknown" ] } ] }, "pausedAt": { "anyOf": [ { "$ref": "#/$defs/UtcDateTimeEncoded" }, { "type": "null" } ] }, "source": { "anyOf": [ { "type": "string", "enum": [ "unknown" ] } ] }, "evidence": { "type": "null" } }, "required": [ "reason", "pausedAt", "source", "evidence" ], "patternProperties": { "^(?!(?:reason|pausedAt|source|evidence)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "reason", "pausedAt", "source", "evidence" ] } } ], "description": "Opt-in response context: request Accept: application/vnd.scheduler-zero.campaign-pause-context.v1+json, application/json. Unnegotiated responses omit pauseContext for strict legacy clients. Old servers omit it even for new clients; an absent field on a paused campaign means unknown attribution." }, { "type": "null" } ] }, "kind": { "anyOf": [ { "$ref": "#/$defs/ShortText" }, { "type": "null" } ] }, "currentVersion": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "inboxCount": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "contactCount": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "createdAt": { "$ref": "#/$defs/UtcDateTimeEncoded" }, "updatedAt": { "$ref": "#/$defs/UtcDateTimeEncoded" } }, "required": [ "id", "workspaceId", "name", "status", "kind", "currentVersion", "inboxCount", "contactCount", "createdAt", "updatedAt" ], "patternProperties": { "^(?!(?:id|workspaceId|name|status|pauseContext|kind|currentVersion|inboxCount|contactCount|createdAt|updatedAt)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "id", "workspaceId", "name", "status", "pauseContext", "kind", "currentVersion", "inboxCount", "contactCount", "createdAt", "updatedAt" ] } }, "steps": { "type": "array", "items": { "type": "object", "properties": { "id": { "type": "string", "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$", "format": "uuid" }, "type": { "type": "string", "enum": [ "email_content", "manual_review", "linked_in_connection_request", "linked_in_in_mail", "phone_call", "text_message", "http_post_request", "attio_task", "heyreach_campaign" ] }, "enabled": { "type": "boolean" } }, "required": [ "id", "type", "enabled" ], "patternProperties": { "^(?!(?:id|type|enabled)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "id", "type", "enabled" ] } } } }, "required": [ "campaign", "steps" ], "patternProperties": { "^(?!(?:campaign|steps)$)[\\s\\S]*$": false }, "additionalProperties": true, "propertyNames": { "type": "string", "enum": [ "campaign", "steps" ] }, "$defs": { "ShortText": { "type": "string", "minLength": 1, "maxLength": 256 }, "UtcDateTimeEncoded": { "type": "string", "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}\\.\\d{3}Z$" } } } ``` ### Underlying API operations - `campaigns.get`: `GET /v1/workspaces/:workspaceId/campaigns/:campaignId`