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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered externally. The description adds value by disclosing that the returned payload is enriched with part classes and animations, but says nothing about behavior when the ID is unknown, permission needs, or how deep the expansion goes.

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?

A single front-loaded sentence with no filler or redundancy. It is well formed but so terse that it leaves little room for the routing and ID-provenance details an agent would benefit from.

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 tool is simple (one required param, no nested objects, no output schema) and the annotations cover safety and world scope, so the bar is modest. The sentence covers what is fetched and that related entities are included, but omits the failure case for a nonexistent ID and any hint about response shape, which matters since no output schema exists.

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% for the single templateId parameter, so the description carries some burden; "by ID" confirms the parameter is the lookup key and the schema supplies the integer/positive constraint. It stops short of explaining where a valid templateId comes from or whether it must be an existing template.

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?

States a specific verb and resource ("Get a template") and adds the retrieval key ("by ID") plus what the response contains (part classes, animations). This distinguishes it implicitly from list_templates, but it never names the create/update/list siblings that an agent might confuse it with.

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 explicit when-to-use guidance, no statement of whether the caller must already hold a template ID, and no pointer to list_templates for discovering IDs or to update_template for modification. Usage is only inferable from the phrase "by ID".

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