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

Annotations only declare idempotentHint=true and destructiveHint=false; the description goes well beyond that with a status state machine — delivered maps to a terminal state that cannot be overwritten by a later failed, failed maps to DELIVERY_FAILED, and abandoned without a note is a no-op. It also discloses the login/auth requirement, which the annotations say nothing about.

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?

Very compact for the payload — a login gate, a call condition, a batch limit, three status transitions, and two sibling redirects, all in a few clauses. The semicolon-chained, telegraphic phrasing makes it slightly harder to scan than a front-loaded sentence-per-idea structure would be.

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 single-parameter, nested-array mutation with only idempotent/non-destructive annotations and no output schema, the description covers auth, batching, state transitions, and no-op behavior. What is missing is what the call returns or how partial failures within the batch surface, which matters for a 10-item write.

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 still adds meaning: it maps the enum values to their internal resulting states and clarifies the changedKeys contract (keys only, never values), including the redirect to update_my_signup_profile for actual answer edits. The `note` field's role is only implicitly covered via the abandoned case, which keeps it short of a 5.

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+resource: report the delivery outcome of an external form per activity, up to 10 at a time. It also distinguishes itself from the two most confusable siblings by name (submit_signup only archives; update_my_signup_profile is for changing answers). An agent can place this tool without opening any 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?

Gives an explicit gating condition ("only call when the user personally reports the external form result"), a hard batch ceiling (≤10, one entry per activity), and routes the competing cases elsewhere: submit_signup for archiving, update_my_signup_profile for edits. When-to-use, limits, and alternatives are all present.

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