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 confirms creation/persistence but says nothing about auth requirements, name-collision behavior (overwrite vs error), whether an ID is returned, or whether the stored template is immutable once saved.

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. It is efficient, though it leaves room to add a differentiating clause without becoming verbose.

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 create operation with a nested object parameter, no annotations, and no output schema, the description is thin. An agent cannot tell whether the call returns the new template's identifier, what happens on duplicate names, or how this differs from save_current_caption_template.

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 100%, so name, tags, and the nested style payload are already documented in the schema. The description adds no extra semantics about required name uniqueness or what fields style accepts, so the baseline 3 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?

Clear verb+resource: 'Save a new caption template definition' states exactly what is created. It does not differentiate from the close sibling save_current_caption_template, leaving ambiguous which one an agent should pick when a template already exists in the editor.

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 gives no conditions for when to use this versus save_current_caption_template, apply_caption_template, or list_caption_templates. 'the user can re-apply later' hints at persistence but does not describe when this tool is the right call.

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