Update vacation responder

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

With no annotations at all, the description carries the full behavioral burden for a mutation tool, and it discloses almost nothing. It does not say whether this is a partial patch or a full replace, what happens to fields omitted from the request, whether it requires account authorization, or how to disable the responder.

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?

A single front-loaded sentence with zero waste. It is efficient, though the terseness is arguably under-specification rather than exemplary conciseness.

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 seven-parameter mutation tool with no annotations and no output schema, the description leaves key questions unanswered: partial vs full update semantics, required authorization, and the effect of enableAutoReply=false. It is not sufficient on its own.

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 100%, so every parameter (account, startTime, endTime, enableAutoReply, responseSubject, responseBodyHtml, responseBodyPlainText) is already documented in the schema. The description adds no syntax, format, or constraint detail beyond that, so the baseline of 3 applies.

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 names a specific verb and resource: 'Update the Gmail vacation (out-of-office) responder settings.' An agent can distinguish it from google_gmail_vacation_get by the update/get verb pair, though the description never explicitly contrasts them.

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?

There is no guidance on when to use this tool versus google_gmail_vacation_get (to inspect current settings) or google_gmail_send. No prerequisites, no note about needing the vacation responder feature enabled, and no mention that all seven parameters are optional.

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