bear_add_tag

Instructions

Implementation Reference

• mcp-server/src/tools.ts:534-558 (schema)

  Input schema definition for bear_add_tag: declares 'id' (string, required) and 'tag' (string, required) with validation. The tool adds a tag to an existing Bear note, inserting it into the note's markdown. Supports hierarchical tags.

  bear_add_tag: {
    tool: {
      name: "bear_add_tag",
      description:
        "Add a tag to an existing Bear note. The tag is inserted into the note's markdown. Hierarchical tags like 'parent/child' also index every ancestor — so the note becomes discoverable under both #parent and #parent/child in Bear's sidebar.",
      inputSchema: {
        type: "object" as const,
        properties: {
          id: {
            type: "string",
            description: "Note ID (uniqueIdentifier)",
          },
          tag: {
            type: "string",
            description: "Tag to add (without #)",
          },
        },
        required: ["id", "tag"],
      },
      annotations: {
        readOnlyHint: false,
        destructiveHint: false,
        idempotentHint: false,
      },
    },

• mcp-server/src/tools.ts:534-566 (registration)

  Registration of bear_add_tag in the tools record. Registered with name 'bear_add_tag' and associated buildArgs function.

  bear_add_tag: {
    tool: {
      name: "bear_add_tag",
      description:
        "Add a tag to an existing Bear note. The tag is inserted into the note's markdown. Hierarchical tags like 'parent/child' also index every ancestor — so the note becomes discoverable under both #parent and #parent/child in Bear's sidebar.",
      inputSchema: {
        type: "object" as const,
        properties: {
          id: {
            type: "string",
            description: "Note ID (uniqueIdentifier)",
          },
          tag: {
            type: "string",
            description: "Tag to add (without #)",
          },
        },
        required: ["id", "tag"],
      },
      annotations: {
        readOnlyHint: false,
        destructiveHint: false,
        idempotentHint: false,
      },
    },
    buildArgs: (input) => [
      "tag",
      "add",
      String(input.id),
      String(input.tag),
      "--json",
    ],
  },

• mcp-server/src/index.ts:33-122 (handler)

  Generic handler that dispatches all tools via CallToolRequestSchema. For bear_add_tag, it calls handler.buildArgs (which returns ['tag', 'add', id, tag, '--json']) and then executes via execBcliWithReauth or execBcliWithStdinAndReauth.

  server.setRequestHandler(CallToolRequestSchema, async (request) => {
    const { name, arguments: input } = request.params;
    const handler = tools[name];
  
    if (!handler) {
      return {
        content: [{ type: "text", text: `Unknown tool: ${name}` }],
        isError: true,
      };
    }
  
    const params = (input ?? {}) as Record<string, unknown>;
  
    // Validate bear_edit_note: need at least one edit operation
    if (name === "bear_edit_note") {
      const hasAppend = params.append_text !== undefined;
      const hasBody = params.body !== undefined;
      const hasSetFm = params.set_frontmatter !== undefined &&
        Object.keys(params.set_frontmatter as object).length > 0;
      const hasRemoveFm = Array.isArray(params.remove_frontmatter) &&
        (params.remove_frontmatter as unknown[]).length > 0;
      const hasFm = hasSetFm || hasRemoveFm;
  
      if (!hasAppend && !hasBody && !hasFm) {
        return {
          content: [
            {
              type: "text",
              text: "Provide 'append_text', 'body', 'set_frontmatter', or 'remove_frontmatter'.",
            },
          ],
          isError: true,
        };
      }
      if (hasAppend && hasBody) {
        return {
          content: [
            {
              type: "text",
              text: "Provide either 'append_text' or 'body', not both.",
            },
          ],
          isError: true,
        };
      }
    }
  
    try {
      const args = handler.buildArgs(params);
      let result: { stdout: string; stderr: string };
  
      // Check if this tool needs stdin piping
      const stdinData = handler.usesStdin?.(params) ?? null;
      if (stdinData !== null) {
        result = await execBcliWithStdinAndReauth(args, stdinData);
      } else {
        result = await execBcliWithReauth(args);
      }
  
      // Parse JSON output from bcli
      const stdout = result.stdout.trim();
      if (!stdout) {
        return {
          content: [{ type: "text", text: "Command completed successfully." }],
        };
      }
  
      // Validate it's JSON and pretty-print
      try {
        const parsed = JSON.parse(stdout);
        return {
          content: [
            { type: "text", text: JSON.stringify(parsed, null, 2) },
          ],
        };
      } catch {
        // If bcli returned non-JSON, pass it through
        return {
          content: [{ type: "text", text: stdout }],
        };
      }
    } catch (error) {
      const message =
        error instanceof BcliError ? error.message : String(error);
      return {
        content: [{ type: "text", text: message }],
        isError: true,
      };
    }
  });