get_messages

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It says messages are 'formatted' but does not explain what formatting entails, how sorting or pagination works, whether authentication is required, or what the returned string actually contains. This is too thin for a tool with no annotation safety or behavior hints.

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 very concise, front-loads the core purpose in one clear sentence, and avoids fluff. The Returns line adds a small amount of value about output format, though it is still minimal. It would be stronger with more behavioral detail, but as a concise structure it is effective.

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 the lack of annotations, 0% schema coverage, and the large sibling tool set, this description is incomplete. It does not clarify pagination, ordering, auth requirements, output formatting semantics, or how this differs from search_messages. An agent would likely need to guess or call the wrong sibling tool.

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%, and the description only references 'the specified space,' which maps loosely to space_id. It provides no additional meaning for user_google_email, order_by, or page_size beyond their parameter names and defaults, so it fails to compensate for the missing schema descriptions.

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 ('Retrieves messages') and the resource ('from a Google Chat space'), making the main purpose unambiguous. It does not explicitly differentiate itself from sibling search_messages, but the scope is specific enough to be generally distinguishable from other Google Chat tools.

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 gives no guidance on when to use this tool versus alternatives like search_messages, list_spaces, or send_message. It does not mention intended scenarios, exclusions, or prerequisites, so an agent must infer usage entirely from the name and the first sentence.

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