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

Annotations already declare idempotent=true, destructive=false and readOnly=false, so safety is covered; the description adds value beyond them with the partial-update contract and the billing prerequisite for enabling auto_apply. It does not say whether disabling auto_apply also disables auto_submit or what an unmet prerequisite looks like as a response.

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?

Three short sentences, front-loaded with the action, then the payload rule, then the prerequisite. No filler and nothing buried.

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 tool is a simple three-flag mutation, an output schema exists so return values need no explanation, and the description covers the action, the partial-update rule, and the key prerequisite. The remaining gap is inter-flag dependency, which matters for a settings tool.

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 0%, so the description carries the burden and does name all three parameters plus the prerequisite for auto_apply. However, it never distinguishes auto_apply from auto_submit (does submitting require applying?) or explains what tailor_resume governs, so half the semantics remain inferred from the names alone.

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 states a specific verb and resource: toggling the three named apply settings on or off. It is clearly distinguishable from get_apply_settings by the 'on or off' framing, though it never names that sibling as the read counterpart.

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?

'Only send the settings to change' gives explicit partial-update guidance, and 'Turning auto_apply on needs Instant or a card on file' states a real prerequisite. It stops short of routing to alternatives such as get_apply_settings for reading current values.

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