Google Chat 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 of behavioral disclosure. It effectively describes the authentication requirement (OAuth), first-run behavior (browser window), and prerequisites (credentials.json file). However, it doesn't mention rate limits, pagination, or what specific data is returned about each space.

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 appropriately sized but not optimally structured. The first sentence clearly states the purpose, but the following authentication details could be more efficiently integrated. While all information is relevant, the flow from purpose to authentication setup could be smoother.

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 no annotations and no output schema, the description provides good coverage of authentication requirements but lacks information about return values, pagination, or error handling. For a list operation with no structured output documentation, more detail about what data is returned would be helpful.

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?

The tool has 0 parameters with 100% schema description coverage, so the baseline is 4. The description appropriately doesn't discuss parameters since none exist, focusing instead on authentication requirements which is the correct emphasis for a parameterless tool.

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 ('List all Google Chat spaces') and resource ('Google Chat spaces the bot has access to'), distinguishing it from siblings like 'get_space_messages' which focuses on messages within spaces rather than listing spaces themselves. The verb+resource combination is precise and unambiguous.

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?

No guidance is provided on when to use this tool versus alternatives. While it implicitly suggests usage for listing accessible spaces, there's no mention of when NOT to use it or how it differs from potential sibling tools. The description focuses on authentication setup rather than usage context.

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