Google Workspace MCP VE

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states the tool sends a message but doesn't cover permissions needed, rate limits, whether it's synchronous/asynchronous, error handling, or what the output contains. This leaves significant behavioral gaps for a mutation tool.

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 a single, efficient sentence with zero wasted words. It's appropriately sized and front-loaded with the core functionality, making it easy to parse quickly.

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 this is a mutation tool with 5 parameters, no annotations, and an output schema (which helps), the description is minimally adequate but incomplete. It states what the tool does but lacks behavioral context, parameter guidance, and usage distinctions that would make it fully helpful for an agent.

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 40% (only 'thread_key' and 'thread_name' have descriptions), leaving 3 parameters undocumented. The description adds no parameter information beyond what's in the schema, so it doesn't compensate for the coverage gap. The baseline is 3 since the schema provides some documentation.

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 action ('Sends') and target resource ('a message to a Google Chat space'), providing a specific verb+resource combination. However, it doesn't differentiate from sibling tools like 'send_gmail_message' or 'search_messages' beyond the platform context, which prevents a perfect score.

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 no guidance on when to use this tool versus alternatives like 'send_gmail_message' or 'search_messages', nor does it mention any prerequisites, constraints, or typical use cases. It's a basic functional statement without contextual framing.

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