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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds value beyond that by disclosing what the call returns (HTML body and plain-text version), which matters since there is no output schema. It omits error/not-found behavior, but that is a minor gap for a read tool.

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?

Two sentences, zero filler, and the action plus return contents are front-loaded before the usage sentence. Every clause earns its place.

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 simple read-by-id tool with rich annotations and full schema coverage, the description covers purpose, usage, and the main return contents, which is sufficient without an output schema. It stops short of enumerating the remaining template fields or failure modes, so it is complete but not exhaustive.

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?

With a single parameter at 100% schema description coverage, the schema already documents template_id and its UUID format. The description's 'by UUID' restates the schema rather than adding syntax, lookup, or validation detail, 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?

States a specific verb (Retrieve) plus resource (Meisa email template), scope (single, by UUID), and contents returned (HTML body, plain-text version). It implicitly separates itself from meisa_list_templates via 'single', but never names a sibling such as meisa_get_template_blocks or meisa_list_templates, so differentiation is left to inference.

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 sentence 'Use this when the user wants to review or inspect an existing template's content' gives a usage scenario, but it is largely restated from the tool name and adds no routing value: it does not say when to prefer meisa_get_template_blocks, meisa_list_templates, or meisa_update_template. Implied usage rather than explicit when/when-not.

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