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

Beyond the annotations (readOnlyHint=false, idempotentHint=true, destructiveHint=false), the description adds meaningful behavioral facts: the original network outcome and recovery history remain immutable, this is an attestation rather than a fabricated receipt, and it requires the notifications:manage permission. These are exactly the kind of context annotations cannot convey.

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 action is front-loaded in the first sentence, followed by three short sentences that each add a distinct constraint (immutability, semantic nature, permission). Dense but waste-free; no filler.

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 mutation tool with no output schema, it covers the safety and permission profile well, but omits the purpose of expected_version (concurrency/version-guard semantics) and the roles of request_id and delivery_id. An agent could invoke it but may misjudge version handling.

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 0%, so the description must carry parameter meaning. It mentions 'note', 'current expected_version', and the received/cancel decision, covering three of five parameters, but request_id and delivery_id are unexplained in both schema and prose. Partial compensation only.

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 concrete action (record an owner declaration of received, or cancel) tied to a note and current expected_version, so the operation's intent is legible. It does not name itself against the many attention_notification siblings (retry, get, list), so an agent must infer the boundary. Clear but lacking sibling differentiation.

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?

Usage is implied by 'Record an owner declaration received or cancel,' and the caution 'never a fabricated receipt or permission to send again' sketches a when-not-to-use boundary. There is no explicit statement of when to choose this over retry_attention_notification_delivery or the get_/list_ siblings, leaving the routing to inference.

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