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

Annotations already declare the safety profile (readOnly=false, destructive=false, idempotent=false, openWorld=false). The description adds value beyond them by disclosing the side effect ('this changes the workspace's project list') and the return behavior ('Returns the created project'). No contradiction with the non-readOnly, non-idempotent hints.

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?

Three tight sentences, front-loaded with the action, then prerequisites, then the effect and return. Every sentence earns its place with no redundancy.

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 two-param create tool with annotations covering the safety profile and no output schema, the description supplies what is missing: the workspaceId source, the side effect, and the return. Only minor gaps remain (workspace eligibility criteria, name constraints).

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 burden, and it does name both params and their intent: workspaceId (must be eligible, sourced from list_projects) and name (project name). It omits format constraints like the UUID pattern and the 256-char name cap, but the essential meaning of each parameter is conveyed.

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 ('Create a Replo project') with the scope of where it lands ('in a workspace'). This is clearly distinguishable from get_project/update_project/list_projects by the verb alone, though it never names a sibling to sharpen the contrast.

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?

Gives the key prerequisite and routes the agent to the right source: 'Requires an eligible workspaceId from list_projects.' That is real when-to-use guidance. It stops short of stating when not to use it (e.g., when the project already exists, use get_project/update_project).

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