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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered by structured data. The description adds genuine context beyond that — the newest-first ordering and the exact field set returned — but says nothing about pagination, default behavior, or what an empty result means, so it is additive without being rich.

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 dense sentence with the ordering constraint front-loaded and no filler. It earns its place almost entirely; the field enumeration is the only part that could be trimmed, though it usefully compensates for the absent output schema.

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 two-optional-parameter read tool with no output schema, the description supplies what the schema cannot: the ordering and the shape of each returned record. Only the interaction between `limit` and ordering, and the empty-result case, are left unstated, which is a minor gap at this complexity.

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%, with both `limit` (default 10, max 50) and `projectId` fully documented in-schema, so the baseline of 3 applies. The description does not mention either parameter's effect on ordering or filtering, adding no meaning beyond the schema.

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 and resource: returns error groups ordered newest first, and enumerates the fields returned. It is clearly distinguishable from runheed_get_error (single error) and runheed_search_errors (query-driven), but it does not name those siblings explicitly, leaving the differentiation for the agent to infer.

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?

Usage is only implied: the word "recent" and the newest-first ordering suggest a quick triage listing rather than a filtered search, but there is no explicit statement about when to prefer this over runheed_search_errors or runheed_get_trends, and no mention that both parameters are optional.

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