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

No annotations are provided, so the description carries the full burden. It implies mutation but never says whether setting a template overwrites prior template settings, whether it is reversible, or whether it requires an open/active project context. 'Of the open project' hints at a precondition but is not elaborated.

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 short sentence with no filler, appropriately sized for a one-parameter tool. It is front-loaded, though the brevity edges into under-specification rather than efficient concision.

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 mutation tool with no annotations and no output schema, the description is too thin: it omits what gets changed, whether prior settings are replaced, any preconditions, and any effect on existing project styling. An agent would be guessing about side effects.

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%, and the description says nothing about templateId. The schema's enum lists the six valid values, so the value domain is known, but the description adds no meaning about what each template does or how the choice affects the project.

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 clear verb ('Set') and resource ('template') scoped to 'the open project', so the agent knows the general operation. However, it doesn't clarify what a 'template' means here (visual theme vs. structural template) or distinguish this from the sibling update_template_color.

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?

No guidance on when to use this tool, no prerequisites (e.g., does a project need to be open, does this overwrite existing customization?), and no named alternatives among the many sibling tools.

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