validate_metadata

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

Despite no annotations, the description reveals key behavioral traits: it checks specific constraints (subtitle length, keyword length, required files, copyright year). This adds context beyond the schema, though it doesn't explicitly state whether the tool is read-only or modifies anything.

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 concise: two sentences with the first stating purpose and the second listing checks. No redundant information, effectively front-loaded.

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?

The description covers the validation checks but lacks information about return values or error handling. Since no output schema is provided, the agent is left guessing the output format. For a simple tool, this gap reduces completeness.

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 coverage is 100% (only one parameter described). The description's parameter info ('must contain fastlane/metadata/ directory') matches the schema's description, so no additional meaning is provided. Baseline score applies.

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: validating fastlane metadata files against App Store requirements. It uses a specific verb ('validate') and resource ('fastlane metadata files for App Store'), and distinguishes itself from siblings like 'populate_metadata' by focusing on validation rather than generation.

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 during App Store preparation but does not explicitly state when to use this tool versus alternatives like 'populate_metadata' or 'publish_ios'. No direct guidance on when not to use it is provided.

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