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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, covering the safety profile. The description adds modest context by mentioning the skill:// methodology guidance, which hints at resource types, but does not disclose output format, pagination, or how the listing relates to ata_read_resource.

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 sentence that front-loads the action and object, then adds a clarifying example. There is no filler or redundancy; every word carries meaning.

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 parameterless list tool with annotations covering safety and no output schema, the description is reasonably complete. It names the resource category and a specific scheme, though it could optionally mention that the result is a list of resource identifiers for use with ata_read_resource.

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 tool has zero parameters, so the baseline is 4. The description adds value by scoping the resource types ('guidance and manifest resources', 'skill:// methodology guidance'), which helps the agent understand what the listing will contain.

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 states a clear verb ('List') and a specific resource ('ATA MCP guidance and manifest resources'), further clarified by 'including skill:// methodology guidance'. It distinguishes from sibling list tools like ata_list_prompts and ata_list_case_studies by focusing on 'resources', though it does not explicitly name alternatives.

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 guidance on when to use this tool versus other list tools or ata_read_resource. The description only states what it does, leaving the agent to infer that it is for discovering resources, and provides no explicit when-not or alternative routing.

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