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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds useful return-field context (amount, payment status, receipt metadata) and the 'secured job' access constraint, but says nothing about pagination, ordering, or what an empty result means.

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?

A single well-formed sentence with the resource and scope front-loaded, followed by the returned fields. Nothing is redundant, though the trailing field list is slightly padded for a one-liner.

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 read-only two-parameter tool with no output schema, the description adequately conveys purpose and result contents but omits parameter meaning, auth expectations around the token, and any result-set behavior. It is minimum viable rather than complete.

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%, and the description never mentions job_id or job_token by name. 'For a secured job' only vaguely hints that a job identifier and credential are required; the agent gets the real parameter meaning from the schema's pattern/minLength, not the prose.

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 resource ('List pass-through expense requests') and scopes it to 'a secured job', which separates it from the evidence/service list siblings. It does not explicitly name an alternative tool, so differentiation is inferential rather than stated.

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 guidance, no statement of preconditions (a secured job requiring a token), and no routing away from human_list_evidence or human_list_services. The agent must infer this is the right tool purely from the noun 'expense'.

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