Respond to a meeting invitation

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

Annotations already flag destructiveHint=true nhận readOnlyHint=false, but the description adds meaningful behavior beyond that: 'Graph returns no content on success,' the attendee-only constraint, response failure for organizer-created events, and the inability to propose a new time. This gives an agent a realistic picture of side effects and limitations.

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?

Three sentences with no wasted words. The main action is front-loaded, followed by the success return behavior awaited then the critical constraints. Every sentence earns its place.

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 mutation tool with no output schema, this description covers the essential facts: what the reply does, the success response (empty content), attendee precondition, and unsupported proposal flow. An agent has enough to decide when and how to call the tool without encountering surprises.

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%, and each parameter (id, comment, response, sendResponse) already has a clear schema description. The tool description adds little parameter-specific meaning beyond restating the response options and the optional comment, so the baseline 3 is appropriate.

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 opens with a specific verb and resource: 'Accepts, declines, or tentatively accepts a meeting invitation...' This clearly distinguishes the tool from siblings like calendar_create_event or calendar_update_event. The additional note that proposing a new time is not supported further sharpens its scope.

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 clear context: responding only works when the signed-in user is an attendee, and it explicitly fails for events the user organized. It also names the unsupported 'propose new time' flow. However, it does not explicitly point to alternatives or say 'use calendar_update_event for edits,' so the when-not-to-use guidance is not fully explicit.

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