Api reference controls partial update

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

Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false and openWorldHint=true, so the safety profile is known. The description adds nothing beyond that: it does not say the update is partial (fields omitted are left untouched), what fields the body accepts, or what permissions are required.

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?

It is a single short sentence, so it is efficient, but the brevity comes from under-specification rather than tight writing; there is no front-loaded operational detail.

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 mutation endpoint with an opaque free-form body, no output schema, and no annotation coverage of semantics, the description leaves every operational question unanswered — what can be patched, whether omitted fields are preserved, and what is returned.

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 body parameter is an opaque anyOf object with no documented shape. The description must therefore compensate, but it says nothing about the required id or what keys belong in body, leaving an agent unable to construct a valid call.

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 sentence names the resource (reference controls) but describes it only as something that can be 'viewed or edited', a generic boilerplate phrasing that ignores the partial-update semantics in the tool name. It does not distinguish this mutation from the sibling reference_controls_update, reference_controls_retrieve, or reference_controls_list tools.

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 indication of when to pick this tool over reference_controls_update (full replace) or reference_controls_retrieve (read). The 'viewed or edited' phrasing actively blurs the read/write distinction an agent needs to route correctly.

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