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

Annotations already establish readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds genuine value by disclosing the shape of each returned entry and the plan-level template cap, but omits ordering, pagination, and whether the cap truncates results — meaningful for a listing with no output schema to fall back on.

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?

One dense sentence with no filler, and the resource scope is front-loaded before the field enumeration. The trailing clause about 'how many templates the plan keeps' reads slightly awkwardly and could have been separated, but nothing is redundant.

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?

With no parameters, no nested objects, and no output schema, the description is the sole source of return-shape information and it delivers that. Gaps are limited to result ordering and any cap-induced truncation, which are secondary for a simple enumeration tool.

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 takes zero parameters, so there is nothing for the description to clarify beyond the schema. It correctly implies the call is account-scoped and unfiltered, which is the only semantic worth conveying here.

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 names the resource ('the account's saved templates') and enumerates exactly what each entry carries (id, name, revision, fields it reads), which separates it from get_template and the render/create siblings. It stops short of an explicit verb like 'list', so the enumeration is doing the work of signalling the operation.

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 statement of when to call this versus get_template, get_template_format, or get_usage. The absence of parameters weakly implies an unfiltered enumeration of the whole account, but the agent is left to infer that from the description's phrasing rather than being told.

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