set_project_labels

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

With no annotations, the description carries the full burden. It does disclose two useful behavioral facts: labels are display-only (no functional effect on secrets or binding) and the project must already exist. It does not say whether the supplied labels replace the entire existing label set or are merged/appended, nor whether the operation requires permissions or errors on a missing project — significant gaps for a mutation.

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 front-loaded sentence with no filler, and the most important qualifiers (display-only, existing project) appear immediately. It is efficient but so terse that it reads as under-specified rather than deliberately compact.

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 not be explained, but this is a two-parameter mutation with zero annotation and zero schema coverage. The description leaves replace-vs-merge behavior, permission requirements, and failure modes for an invalid project id entirely unaddressed, which is inadequate for the tool's complexity.

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%, so the description must compensate. It clarifies that project_id refers to an existing project and that labels are display-only strings, which adds meaning beyond the bare schema. However, the critical semantic — whether the labels array is a full replacement set or additive — is left unstated, so the compensation is incomplete.

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 gives a specific verb ("Set") and resource ("labels") scoped to "an existing project id," which distinguishes it from generic project tools like bind_project or select_project. It lacks an explicit contrast with any named sibling, so it stops short of full differentiation.

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?

No when-to-use guidance, no exclusions, and no mention of alternatives such as per-secret tooling. The only implicit constraint is "existing project id," which hints at a prerequisite but never states what happens for an unknown id or whether the project must first be selected or bound.

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