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

With annotations already declaring readOnly=false and destructive=false, the description earns credit for adding the consent requirement ('owner's own ask') and for disclosing that each mode consumes a structurally different body. It does not, however, disclose the confirmation flow (confirmation_id/confirmation_via) or partial-update semantics — whether omitted fields are preserved or cleared.

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?

Telegraphic and front-loaded: the mode list comes first, then each mode's discriminating rule, with no filler sentences. The terse phrasing ('every one needs the owner's own ask') is slightly cryptic and costs a beat of parsing, but the structure is sound.

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 write tool with a three-variant polymorphic body and no output schema, the description covers the mode logic well but skips the required idempotency_key and the entire confirmation mechanism — an agent would have to fall back on the bare schema to learn it must supply an 8–128 character key. That is a meaningful omission for a mutation tool even though annotations cover the safety profile.

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 only 33%, so the description has to carry weight — and it does add real value by mapping the three-way anyOf body onto create/update/status and enumerating the updatable fields. But it never mentions idempotency_key, which is required, nor confirmation_id/confirmation_via, so roughly half the parameters remain undocumented in both places.

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 opening sentence names a specific verb set and the resource, and then delineates three distinct modes (create / update / report) keyed on project_id and action, so an agent can tell which branch it needs. It stops short of differentiating from the read-side sibling (get_project), which is a genuine ambiguity given that 'report its status' can sound like a read.

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?

Mode selection is spelled out explicitly: 'No project_id: create', 'With project_id: update', 'project_id + action "status": report'. It also states a precondition in 'every one needs the owner's own ask', which tells the agent not to invoke unprompted. The only gap is that no alternative read tool is named for the status-reporting case.

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