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

Annotations already declare readOnlyHint=false, destructiveHint=false, and openWorldHint=false, so safety profile is covered. The description adds the useful domain fact that every project is bound to a client, but says nothing about template application, idempotency on duplicate names, or what is returned. With annotations present, a 3 is appropriate.

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 with the purpose front-loaded and no filler. The terseness is efficient rather than padded, though it borders on under-specification for a five-parameter mutation tool.

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?

A mutation tool with five parameters at 0% schema coverage, no output schema, and no annotation-level detail about effects. The description leaves template_id, the description field, and the creation's return value (presumably the new project id needed for follow-up calls) entirely undocumented.

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% across 5 parameters, so the description carries the full burden, yet it only addresses client_id and client_email and only in terms of where to source them. name, description, and especially template_id (which likely relates to list_templates/find_templates) are completely unexplained, leaving the agent to guess at required formats and semantics.

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?

Specific verb+resource ("Create a project") plus the domain qualifier "for one of the org's clients," which makes it distinguishable from create_client. It doesn't explicitly contrast with siblings like create_client or start_website, 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?

Gives conditional guidance for obtaining the client identifier: pull client_id from list_clients, or use client's email if that's what the person supplied. That's a clear routing rule to a sibling, but there's no statement of when not to use this tool or what to do if the client doesn't exist yet.

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