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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the set of fields (state, priority, asset, reporter, due date, resolution) and the optional expansion via includes, which is modest additional context but says nothing about auth scope or payload size when includes are used.

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 compact sentences plus an endpoint fragment, front-loaded with the resource and its contents. 'GET /issues/{id}' is mildly redundant with the tool's REST mapping but costs almost nothing and confirms the identifier semantics.

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 and does so by naming the fields returned; includes-driven expansions are listed too. It is adequate for a simple two-parameter read tool, though it omits what the payload looks like when includes are supplied.

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% and both parameters are documented in the schema, including the important 'Issue id (not the issue number)' clarification. The description restates the includable categories already present as the enum, adding no syntax or format detail, so 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+resource implicitly ('One issue with full detail') and enumerates the returned attributes, so an agent can distinguish it from the sibling fleetio_list_issues by the singular scope. It stops short of naming the sibling explicitly the way a 5 would.

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 implied by the field list and 'GET /issues/{id}' — fetch one issue by id — but there is no explicit when-to-use versus fleetio_list_issues, no prerequisites, and no stated conditions for choosing includes.

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