Google Workspace MCP Server

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries full burden. It states the tool retrieves content but doesn't disclose behavioral traits like authentication requirements (implied by user_google_email but not explicit), rate limits, error conditions, or whether it's read-only (implied but not stated). The description adds minimal context beyond basic functionality.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is well-structured and front-loaded with the core purpose in the first sentence. The Args and Returns sections are clear and necessary, with zero wasted words. Every sentence earns its place by providing essential information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 2 parameters with 0% schema coverage and an output schema (returns str), the description adequately covers the tool's purpose and parameters. However, as a read operation with no annotations, it could benefit from more behavioral context (e.g., auth needs, error handling). The output schema reduces the need to explain return values in the description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It explains both parameters: message_id ('unique ID of the Gmail message to retrieve') and user_google_email ('user's Google email address. Required.'). This adds meaningful semantics beyond the schema's bare titles, though it doesn't detail format constraints (e.g., email validation).

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the specific action ('Retrieves'), resource ('full content of a specific Gmail message'), and scope ('subject, sender, plain text body'). It distinguishes from sibling tools like 'get_gmail_messages_content_batch' (batch retrieval) and 'get_gmail_thread_content' (thread-level).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for retrieving a single message's content, but doesn't explicitly state when to use this vs. alternatives like batch retrieval tools or when not to use it (e.g., for metadata only). No prerequisites or exclusions are mentioned.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.