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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered by structured data. The description adds nothing beyond that – no note on what happens with an unknown/stale ID or whether the response is scoped to the caller's organization.

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?

One short, front-loaded sentence with no filler. It is appropriately sized for a trivial lookup tool, though it is so terse that it leaves no room for the routing context an agent would benefit from.

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?

No output schema exists, but for a get-by-ID tool the return value is self-evident from the resource name, so that omission is minor. Given only one documented parameter and full annotation coverage, the description is sufficient to call the tool correctly, though it could note the parent-project relationship.

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 the single param 'id' is documented as a UUID 'Project update ID'. The description's 'by ID' merely restates the schema, so baseline 3 applies for a one-parameter tool where the schema does the work.

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 ('Get') and resource ('a single project update'), and 'by ID' signals a fetch-one semantic that distinguishes it from the sibling list_project_updates. It does not explicitly name the list/update/delete alternatives, but the get-vs-list distinction is unambiguous.

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?

There is no guidance on when to use this instead of list_project_updates (to browse updates) or get_project (to fetch the parent project). The presence of 'by ID' implies direct lookup, which is the minimum viable inference, but no condition or alternative is stated.

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