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

Annotations already declare readOnlyHint=false and destructiveHint=true, so the write/mutation profile is covered. The description adds one genuinely useful behavioral fact: unspecified settings are preserved because only changed values need to be sent. It says nothing about permissions, side effects on refresh jobs, or reversibility, so it goes only modestly beyond the annotations.

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?

One short sentence, front-loaded with the action and resource, with the invocation constraint appended. Nothing is redundant or padded.

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?

An output schema exists, so return values need no explanation, and the tool surface is small. However, for a mutation flagged destructiveHint=true, the description omits the obvious workflow context that setup_get_settings should be consulted first, and says nothing about the effect of interval changes.

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 single parameter is a nested object with four enum-constrained sub-properties. The description usefully explains the contract of 'set' as a partial-change payload (consistent with minProperties: 1), but it does not describe any of the individual sub-keys such as assets_refresh_interval or insights_auto_refresh.

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: 'Change background refresh settings', which is concretely narrower than the sibling setup_get_settings and the setup_* read/status tools. It does not explicitly name the read counterpart, but the resource is unambiguous.

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 phrase 'pass only changed values' implies partial-update usage, which tells the agent how to invoke it but not when to use it versus setup_get_settings or setup_readiness_check. No prerequisites or exclusions are given.

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