Google Workspace MCP Server

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

With no annotations provided, the description carries the full burden. It discloses important behavioral traits: the batch size limit (25 threads), automatic chunking behavior, and the formatted return format. It doesn't mention authentication requirements, rate limits, or error handling, but provides substantial operational context.

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 perfectly structured: a clear purpose statement, a practical constraint, then organized parameter and return sections. Every sentence earns its place with zero wasted words. The information is front-loaded with the most important details first.

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?

For a 2-parameter tool with no annotations but with an output schema, the description provides excellent coverage of purpose, constraints, and parameter semantics. The output schema handles return value details, so the description appropriately focuses on operational context. It could potentially mention authentication scope but is largely complete.

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?

With 0% schema description coverage, the description fully compensates by explaining both parameters: 'thread_ids' as 'A list of Gmail thread IDs to retrieve' with automatic batching behavior, and 'user_google_email' as 'The user's Google email address' marked as required. This adds crucial meaning beyond the bare schema.

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 the content'), resource ('multiple Gmail threads'), and scope ('in a single batch request'). It distinguishes from sibling tools like 'get_gmail_thread_content' (singular) and 'get_gmail_messages_content_batch' (messages vs threads).

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 provides clear context about when to use this tool ('multiple Gmail threads in a single batch request') and includes a practical constraint ('Supports up to 25 threads per batch to prevent SSL connection exhaustion'). However, it doesn't explicitly mention when NOT to use it or name specific alternatives like the singular thread content tool.

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