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

Annotations already cover the safety profile (readOnlyHint=true, destructiveHint=false, openWorldHint=false), so the bar is lower. The description adds genuinely useful context beyond them: reading a specific draft version additionally requires the template:write scope, and without versionId the released version is read. It also discloses the shape of the returned payload, though it omits any error or not-found behavior.

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?

Within each language the text is front-loaded and dense, with the return contents stated first and the workflow second. The main cost is that the entire content is duplicated in German and English, effectively doubling length, which trades conciseness for multilingual reach.

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 output schema, the description carries the return-value burden well by enumerating the fields returned for standard vs. block templates and describing the conditional versionId read. An agent has enough to call the tool correctly and to know what comes back.

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 coverage is only 33%: only versionId is documented in the schema, and the description largely restates its versionId/template:write semantics rather than expanding them. templateId and reasoning are undocumented in both places, though the description does frame templateId via curated templates from template_list. With low coverage, the description does not fully compensate for the un-described parameters.

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 gives a specific verb (returns/reads a single template) and enumerates exactly what is returned: subject and content template, merge fields, the recommended approval default, plus blocksTemplate and styleDefs for block templates. It is clearly distinguishable from template_list (curated discovery) and template_apply_with_merge_fields (filling placeholders).

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?

It lays out the full crafting loop with named alternatives and their order: template_get on a curated template, edit blocksTemplate, letter_preview, template_save, template_preview, template_release. It also names the explicit next step, template_apply_with_merge_fields, and explains the versionId variant. When-to-use is fully specified rather than inferred.

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