gcloud_container_clusters_get_credentials

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

No annotations are provided, so the description carries full burden for behavioral disclosure. It correctly indicates this is a credentials-fetching operation (not a read-only query), which suggests side effects like updating kubeconfig. However, it does not specify if this modifies local state, requires prior authentication, or has any destructive potential.

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, concise sentence with no wasted words. It is front-loaded with the core action. However, it could be slightly improved by including usage guidance or disclaimers without significantly increasing length.

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?

Given the tool has 3 parameters (all documented), no output schema, and no annotations, the description adequately states the core function. However, it lacks detail on return values (is it just success indication?), side effects (updates kubeconfig?), and prerequisites (gcloud auth?), which would be helpful for an agent.

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 100%, so the baseline is 3. The description adds value by clarifying the purpose of the parameters in context ('kubectl credentials for a GKE cluster'), which helps the agent understand that cluster_name identifies the target cluster. It does not elaborate on zone vs. region, but the schema already describes them.

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 ('get') and resource ('kubectl credentials for a GKE cluster'), clearly indicating what the tool does. It also naturally distinguishes from siblings like 'gcloud_container_clusters_list' and 'gcloud_container_clusters_describe', which serve different purposes.

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 when kubectl credentials are needed for a GKE cluster, but provides no explicit guidance on when to use this vs alternatives (e.g., authentication flows or cluster listing). No exclusions or prerequisites are mentioned.

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