Validate Deployment Permissions

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states the tool 'checks' permissions, implying a read-only operation, but does not clarify if it performs actual API calls, requires specific authentication, has rate limits, or what the output format is. This leaves significant gaps for a tool that likely interacts with GCP IAM services.

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, clear sentence that efficiently conveys the tool's purpose without unnecessary words. It is front-loaded and appropriately sized, with every part contributing essential information, making it highly concise and well-structured.

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 complexity of GCP IAM permissions validation, no annotations, and no output schema, the description is insufficient. It lacks details on behavioral traits (e.g., authentication needs, error handling), output format, or how results are presented, making it incomplete for effective agent use despite the concise purpose statement.

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?

The input schema has 100% description coverage, so the schema fully documents parameters like 'service' with allowed values and 'project' with defaults. The description adds no additional parameter semantics beyond implying validation for 'deploying to common GCP services,' which aligns with the schema but does not enhance it, meeting the baseline for high schema coverage.

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 clearly states the tool's purpose: 'Check if current caller has required permissions for deploying to common GCP services.' It specifies the verb ('check'), resource ('permissions'), and context ('deploying to common GCP services'), but does not explicitly differentiate from sibling tools like 'gcp-iam-test-project-permissions' or 'gcp-iam-test-resource-permissions', which appear to have overlapping functionality.

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 provides no guidance on when to use this tool versus alternatives. It mentions 'deploying to common GCP services' but does not specify scenarios, prerequisites, or exclusions, nor does it reference sibling tools like 'gcp-iam-test-project-permissions' for comparison, leaving usage context unclear.

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