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

readOnlyHint=true already tells the agent this is a safe read, and the description adds nothing further — no note on what happens when the ID is unknown (error vs empty), no permission/scope requirements, no mention of ID format. With annotations covering the safety profile the bar is lower, but the description contributes essentially nothing beyond the annotation.

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 front-loaded sentence with no filler; the resource and the identifying key come first. It is efficient, though so terse that brevity shades into under-specification rather than true crispness.

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 one-parameter read tool with readOnlyHint and no output schema, the essentials are covered — an agent knows what it fetches and how to identify it. Missing are the ID format and failure behavior on an unknown ID, which are the only real gaps for a tool this simple.

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%, so the description must carry the meaning of the single `id` parameter. It only restates "by its ID" without giving the expected identifier form (e.g. a Hub Planner object ID vs a human-readable project code) or any constraint context beyond the schema's minLength/maxLength.

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 ("Get one Hub Planner project") and scopes it to a single record via ID, which implicitly distinguishes it from hubplanner_list_projects and hubplanner_search_projects. It does not name those siblings explicitly, but the singular-by-ID framing makes the intent unambiguous.

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?

There is no guidance on when to use this versus hubplanner_search_projects or hubplanner_list_projects, nor any stated prerequisite such as already having a valid project ID. The condition "by its ID" is the only hint an agent gets, and it is left implicit.

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