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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered structurally. The description adds genuine context by naming what the record contains (examples, source, verification status), but says nothing about error behavior for unknown ids or access scope.

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 compact sentence with no filler, and the resource and returned content are front-loaded. It is efficient but terse enough that it omits routing and parameter information.

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 usefully enumerates return contents (examples, source, verification status), and annotations cover safety. However, for a lookup-by-identifier tool it leaves the meaning and provenance of the required id unexplained, which is a meaningful gap.

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%: the single required 'id' parameter is only typed as an integer with minimum 1, and the description never mentions it. With one required parameter and zero schema documentation, the description should explain what the id identifies and how to obtain it, which it does not.

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 verb 'Loe' (read) plus the resource 'muhu keele avalikku kirjet' (public record of the Muhu language) states a specific action and target. It does not name or contrast with the siblings search_muhu or list_muhu_sources, 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?

No statement of when to use this tool rather than search_muhu or list_muhu_sources, and no prerequisite guidance such as where a valid id comes from. Usage is only implied by the 'public record' framing.

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