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 only the REST endpoint mapping, which is developer trivia rather than behavioral context. It discloses nothing about pagination, rate limits, auth needs, or return shape.

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 short sentences, front-loaded with the action and scope. The trailing 'ClickUp REST: GET /team/{team_id}/space' is marginally redundant for an agent but harmless and brief.

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 should ideally hint at what a space contains or the return shape, but it does not. For a simple read-only list tool the essentials are present, so it is minimally adequate rather than rich.

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%, so both team_id and archived are already documented in the schema. The description adds the parenthetical '(team)' clarifying team_id as workspace id, but nothing beyond the schema. 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+scope: 'List spaces in a workspace (team).' This clearly differs from siblings such as list_folders and list_lists that operate on other resources. It does not explicitly name which sibling to prefer, but the resource noun is 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?

Usage is only implied by the resource name — an agent can infer it lists spaces, but there is no statement of when to use this versus list_folders or list_workspaces, nor prerequisites like required access. Adequate but with clear gaps.

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