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

Annotations already disclose readOnly=false, openWorld=true, idempotent=false, and destructive=false, so the write/safety profile is covered. The description does add privacy behavior beyond the annotations: the contact is encrypted and only a masked projection is returned. It does not explain the 'paid' aspect, escrow implications, cost, or side effects of creation, leaving meaningful gaps for a creation tool.

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 compact sentences, with the core action and required inputs front-loaded. The second sentence usefully carries the return/masking behavior rather than padding, though the contact's encryption is already stated in the schema, creating mild redundancy.

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 3-required-param mutation with no output schema, the description covers inputs and the masked return, but omits the lifecycle context an agent needs: what a 'paid' request entails, whether payment or escrow is triggered, and what status the caller should expect afterward. Adequate but incomplete.

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 100%, so the schema already documents every parameter, including the encryption/never-echoed note for contact. The description's 'exactly a mission, goal, and sensitive contact' only restates the required set, adding no syntax, format, or constraint detail beyond the schema. Baseline 3 applies.

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 (Create) and resource (paid private request) and enumerates the exact required inputs ('exactly a mission, goal, and sensitive contact'). It is clear, but it never names a sibling (e.g., post_mission, route_task) to distinguish itself, so the agent must infer where this sits in the mission lifecycle.

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?

There is no when-to-use or when-not-to-use guidance. With siblings like post_mission and route_task in the same family, the description gives no criteria for choosing create_paid_request over them, nor does it state prerequisites or the sequence of calls it belongs to.

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