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

No annotations are present, so the description carries the disclosure burden. It does state that the operation changes specific fields and gives the allowed status values (active|paused), which is useful. However, it omits behavioral details such as what pausing does to the listing, whether the update is partial or full, permission requirements, or any irreversible effects.

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?

The description is a single front-loaded sentence with no filler. It immediately communicates the action and the affected fields/values, making it efficient for an agent to parse.

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?

The description is adequate for a simple update tool: it covers the primary mutable fields and status values, and the schema covers required parameters. However, there is no output schema and the description doesn't describe the return value, the meaning of a partial patch, or the side effects of pausing, leaving some contextual gaps an agent must resolve elsewhere.

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?

With only 50% schema description coverage (patch has a generic description; id has none), the description adds real value by naming the concrete fields and the status enum, which is especially important because patch uses additionalProperties. It anchors patch contents to create_listing field names via the schema, but doesn't define the 'id' parameter explicitly.

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?

The description uses a specific verb ('Change') and resource ('my listing') and enumerates the mutable attributes: price, copy, SLA, payment timing, and status. It is clearly distinct from siblings like create_listing/get_listing by the act of modifying an existing listing, though it doesn't name alternatives 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?

The description implies usage context (update or pause an existing listing) but provides no explicit when-to-use/when-not-to-use guidance or alternative tool names. It does not explain when to choose create_listing over update_listing, leaving the agent to infer from the word 'change'.

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