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

Goes well beyond the annotations: discloses the privacy surface ('Draft links contain preferences and the chosen location'), the operational side effects ('Hosted calls record private request quota and telemetry'), and that calendar apps, not this tool, control refresh timing. It also confirms the draft is editable but not saved or subscribed, consistent with destructiveHint=false.

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?

Front-loads the deliverable in sentence one, then boundaries, then return value. Four sentences carry a lot of signal, though the telemetry/quota and calendar-refresh sentence is lower priority and slightly denser than needed.

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 6-parameter nested-object mutation with an output schema, it covers the missing pieces: what is produced (draft plus preview link), what is explicitly not done, how the user confirms and saves in the browser, and the next-30-days preview window. Nothing an agent needs to invoke it correctly is absent.

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 already 83%, with place, location, radius_miles, interests and their nested fields documented in-schema. The description only restates the parameter concepts ('interests, a fixed area, weekdays, time windows and exclusions') without adding format or edge-case meaning, so the schema does the heavy lifting.

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?

States a specific verb and resource ('Prepare an editable, free calendar draft and a VenuNite preview link') plus the exact inputs it derives them from. It also implicitly separates itself from search_events by declaring 'The tool performs no event search, geocoding, calendar save or subscription.'

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?

Clear context for use (interests, fixed area, weekdays, time windows, exclusions) and explicit exclusions of what the tool does not do, which steers the agent away from treating it as a search or save tool. It never names search_events or create_ticket_handoff as alternatives for those adjacent jobs, so the routing is implied rather than stated.

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