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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds genuinely non-obvious billing behavior (5 prepaid credits, production billing required), but says nothing about what the scan returns, how 'missing' is determined, or how malformed lists are handled.

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?

Two short sentences with zero filler, and the functional statement is front-loaded ahead of the billing caveat. Nothing needs trimming or reordering.

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 one-parameter analysis tool with no output schema, the definition should describe the shape of the result (per-obligation findings, gap list, summary counts). That is missing, though the billing and input-source notes partially compensate for the absent structured documentation.

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% for the single 'obligations' array parameter, so the description has to carry the load. It implies the list items carry owner and deadline fields and that the tool looks for their absence, but it never documents the element shape or required fields within each obligation.

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 and target ('Identify missing owners and deadlines') against a named resource ('a user-supplied obligation list'), which is concrete enough to picture the operation. It does not explicitly contrast with the many sibling gap-scan tools (e.g. privi_pro_control_evidence_gap), so differentiation is left to the agent.

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 only implied: the phrase 'user-supplied obligation list' signals the prerequisite input, and 'PAID ONLY: 5 prepaid credits; production billing required' states a real precondition for calling. There is no statement of when to prefer this over the sibling gap scanners or when not to use it.

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