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

The description does add value beyond the annotations: weather is user-supplied, no transport is booked, no permits filed, nothing fetched externally, and updates are partial. Yet annotations declare destructiveHint=true, and the description never warns that passing a text field overwrites its prior content (it only notes that list linking is additive via the schema). That is the one behavioral trait an agent most needs disclosed.

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?

The purpose is front-loaded in the first clause, and the sentences are tight with no filler. The negative enumeration ('books no transport, applies for no permit, nothing fetched') is slightly repetitive but each clause carries distinct behavioral information.

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 13-parameter tool with a fully documented schema and no output schema, the description covers the operation, the partial-update contract, and the no-external-effects guarantee. The notable gap is failure behavior (invalid id, permission denial) and the destructive overwrite semantics implied by annotations.

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%, with all 13 parameters documented in the schema, so the baseline is 3. The description reinforces a handful of fields (date, call time, weather, transport, permits, backup plan) but adds no syntax or format guidance beyond what the schema already states.

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 a shoot day') and enumerates the kinds of edits (date, call time, notes on weather/transport/permits/backup plan). That distinguishes it from get-shoot-day or list-shoot-days by role, but it never names a sibling explicitly (e.g., create-shoot-day for new days), so it stops short of a 5.

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 scopes usage by permission ('the signed-in user can edit in their own Bardiyah workspace') and by semantics ('Only the fields you pass are changed'), which implies partial update rather than full replacement. However, it gives no explicit when-to-use/when-not guidance or pointer to alternatives like create-shoot-day or get-shoot-day for read-only inspection.

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