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

Annotations already declare readOnlyHint=true, so the safe read nature is covered. The description adds the organizational scope and a REST endpoint mapping, but says nothing about pagination behavior, sorting, or result size; with annotations present, this is a modest but not empty contribution.

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 that are front-loaded with the core action. The second sentence ('Portkey: GET /workspaces.') largely restates the name and adds little, slightly weakening an otherwise efficient definition.

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 read-only list tool with full schema coverage, no required parameters, and readOnlyHint annotations, the description is essentially complete. Return format and pagination details are unnecessary since the schema covers inputs and no output schema exists.

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%: page_size and current_page are fully documented in the schema with defaults. The description adds no parameter-level meaning beyond that, so the baseline of 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?

The description states a specific verb and resource ('List workspaces') and scopes it to the organization, so an agent knows exactly what it returns. It does not explicitly distinguish itself from the singular sibling 'portkey_get_workspace', so it falls short of a 5.

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 tool versus the many other list/get siblings such as portkey_get_workspace or portkey_list_workspace_members. The listing purpose is implied only by the word 'List' in the name and description.

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