read_matrix_snapshot

Instructions

Implementation Reference

• index.js:420-440 (registration)

  Registers the 'read_matrix_snapshot' tool with the MCP server, including name, description, and input schema.

    name: "read_matrix_snapshot",
    description: "Read Matrix entries for a date range. Returns all entries for specified topics and dates.",
    inputSchema: {
      type: "object",
      properties: {
        startDate: {
          type: "string",
          description: "Start date YYYY-MM-DD (optional, defaults to beginning)"
        },
        endDate: {
          type: "string",
          description: "End date YYYY-MM-DD (optional, defaults to today)"
        },
        topics: {
          type: "array",
          items: { type: "string" },
          description: "Array of topics to include (optional, defaults to all)"
        }
      }
    }
  },

• index.js:422-438 (schema)

  Input schema defining optional parameters startDate, endDate, and topics array for filtering matrix entries.

  inputSchema: {
    type: "object",
    properties: {
      startDate: {
        type: "string",
        description: "Start date YYYY-MM-DD (optional, defaults to beginning)"
      },
      endDate: {
        type: "string",
        description: "End date YYYY-MM-DD (optional, defaults to today)"
      },
      topics: {
        type: "array",
        items: { type: "string" },
        description: "Array of topics to include (optional, defaults to all)"
      }
    }

• index.js:703-705 (handler)

  Handler in the CallToolRequestSchema switch statement that invokes callAPI('readMatrixSnapshot', args) to execute the tool logic via Google Apps Script.

  case "read_matrix_snapshot":
    result = await callAPI("readMatrixSnapshot", args);
    break;

• index.js:74-131 (helper)

  Helper function that makes HTTP POST requests to the Google Apps Script API endpoint, used by all matrix tools including read_matrix_snapshot to delegate execution.

  async function callAPI(action, data = {}) {
    debugLog('=== API CALL START ===');
    debugLog(`Action: ${action}`);
    debugLog(`Data: ${JSON.stringify(data)}`);
  
    try {
      // Build form-encoded body for POST
      const formData = new URLSearchParams();
      formData.append('action', action);
  
      // Add all data fields to form
      for (const [key, value] of Object.entries(data)) {
        if (value !== undefined && value !== null) {
          formData.append(key, value.toString());
        }
      }
  
      const formString = formData.toString();
      debugLog(`FormData: ${formString}`);
      debugLog(`API_URL: ${API_URL}`);
  
      // Use POST with proper content type
      const response = await fetch(API_URL, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
        },
        body: formString
      });
  
      debugLog(`Response status: ${response.status}`);
      debugLog(`Response ok: ${response.ok}`);
  
      if (!response.ok) {
        debugLog(`Response not OK: ${response.status} ${response.statusText}`);
        throw new Error(`API request failed: ${response.status} ${response.statusText}`);
      }
  
      const text = await response.text();
      debugLog(`Response text length: ${text.length}`);
      debugLog(`Response text: ${text}`);
  
      if (!text) {
        debugLog('ERROR: Empty response from API');
        throw new Error('Empty response from API');
      }
  
      const parsed = JSON.parse(text);
      debugLog(`Parsed successfully: ${JSON.stringify(parsed)}`);
      debugLog('=== API CALL END ===');
      return parsed;
  
    } catch (error) {
      debugLog(`ERROR in callAPI: ${error.message}`);
      debugLog(`ERROR stack: ${error.stack}`);
      throw error;
    }
  }