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

Goes well beyond the annotations: it delimits the destructive scope (only touches manual entries, never booking-derived ones), explains that a booked night can never be set by hand, and discloses an authorization prerequisite the annotations cannot express. The destructiveHint=true annotation is corroborated and clarified rather than merely restated.

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 dense paragraph, front-loaded with the core action and status list; every clause carries information (status meanings, manual-vs-booking scope, auth prerequisite). It is on the long side and could be split for scanability, but there is little waste.

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 two-parameter mutation with full schema coverage and no output schema, the description covers effect, scope limits, and prerequisites. It omits return/error behavior and what happens when re-setting the same status (relevant given idempotentHint=false), which keeps it just short of complete.

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 coverage is 100%, so the baseline is 3, but the description adds real meaning: it glosses soft_hold as 'pencilled' and spells out that 'available' clears the manual entry rather than setting one. It does not, however, add anything about the date parameter beyond the schema's YYYY-MM-DD range.

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 states a specific verb (set) on a specific resource (a date on the member's own GigXchange calendar), with the exact domain of the write (availability statuses). The 'own' qualifier and the calendar framing make it distinguishable from read-side siblings like my_availability and check_member_availability without opening a schema.

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?

It gives clear usage context: which statuses exist, what 'available' does versus the others, and a hard prerequisite ('Allow my assistant to act' switch under Settings > Integrations > AI). It also rules out hand-setting booked nights, implicitly routing the agent to real booking tools. It stops short of naming a sibling tool or stating explicitly when to prefer this over my_availability.

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