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

Annotations only supply destructiveHint=true; the description adds real context: the underlying endpoint (PATCH /v1/profiles/{profileId}), that the update is partial and JSON-based, that fields use YCBM's own names, and that the path id must not appear in the body. It stops short of warning what a bad write could break (e.g. changing subdomain invalidating booking links), so not a 5.

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 tight sentences, front-loaded with the mutation warning and the resource, then the endpoint and the parameter contract. No filler or repetition.

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 destructive mutation with no output schema and an open-ended passthrough object, the description covers endpoint, partial-update semantics, and field naming conventions adequately. It omits any note on consequences of changes or what the response returns, but the essential calling information is present.

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 value the schema doesn't: profile fields are numerous and must use YCBM's native names, and the path id is path-only and never sent in the body. That clarifies the otherwise opaque free-form `fields` passthrough.

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 ('MUTATES ... updates a profile's (booking page) configuration') and flags the operation class with a leading MUTATES marker. An agent can distinguish it from youcanbookme_get_profile and the other update_* siblings without opening the 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?

Makes clear this is a partial update of an existing profile via PATCH, which implicitly routes against the create and get siblings. It does not state explicit exclusions or prerequisites (e.g. permissions), so it falls short of a 5.

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