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

Annotations only declare idempotentHint=true, so the description carries real weight and does: irreversible action, login required, per-value confirmation, fill-only-empty semantics, canFill=false fields skipped, filledCount potentially less than fieldKeys and must be reported honestly, plus the side effect that the organization will see the claim. The 'irreversible' warning is compatible with idempotency (re-runs fill nothing new) rather than contradictory.

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?

No wasted sentences — every clause carries an operational constraint, and the irreversible warning is front-loaded. The telegraphic arrow-chain style is dense and takes effort to parse, but trimming it would lose real guidance.

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?

There is no output schema, and the description compensates by describing the return-side signal (filledCount, canFill) and how to report partial results. Combined with the full workflow chain and mutation semantics, an agent has everything needed to call it correctly and safely.

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% (only contactId documented), but the description compensates by specifying where contactId comes from, that fieldKeys must contain the complete set returned by list_my_organization_claims, and that accept must be true. It does not explain what each of the 11 enum field keys means, though the enum names are largely self-describing.

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 compound action (claiming pending organization data and backfilling it into one's own cross-form signup profile) with an explicit non-overwrite scope rule. It is clearly separable from siblings like list_my_organization_claims (the source) and submit_signup (the downstream step), which are named directly.

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 ordered workflow: list_my_organization_claims to obtain id/fields, then this tool with all fieldKeys and accept=true, then get_signup_gaps, then submit_signup. It also imposes a hard prerequisite (login) and a mandatory UX condition (display each value and obtain confirmation) before calling, leaving little to inference.

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