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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered structurally. The description adds useful output context (trail mile, coordinates, height) but says nothing about defaults, pagination, or what happens when no filter is supplied, so it adds modest value beyond annotations.

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 with the resource and return fields front-loaded, and no filler. It could be tightened further by naming a verb and dropping the redundant filter clause.

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?

There is no output schema, so the description usefully enumerates the fields returned, which is the main completeness risk for a list tool. It falls short only on default behavior (e.g., returning all points when unfiltered) and result-size/pagination expectations.

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 50%: 'section' is documented in the schema and 'kind' is self-describing via its enum, so the description's 'filter by kind or section' largely echoes structured data. It also arguably mislabels the space by saying 'lakes' while the enum value is 'water', adding slight confusion rather than clarity.

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?

Names the resource (PCT points: towns, passes, lakes, peaks) and the returned attributes (trail mile, coordinates, height in feet), so an agent knows exactly what it lists. However, it lacks an explicit verb and does not differentiate itself from siblings like get_pct_leg or find_by_trail_mile, leaving a small ambiguity about when this list tool is the right pick.

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 only usage signal is 'Filter by kind or section,' which describes the parameters rather than when to choose this tool over find_by_trail_mile or get_pct_leg. No exclusions, prerequisites, or alternative-selection guidance is provided.

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