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

Annotations already establish this is a non-read-only, non-destructive, closed-world mutation. The description adds information annotations do not carry: the call is 'Free', and no script is needed to succeed, both of which affect an agent's decision to call it early. It stops short of describing the resulting project's state or what identifier comes back.

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?

Front-loaded with the verb and the cost/sufficiency facts in short sentences; nothing is padded. The trailing fragment 'Then build_plan (free) and quote.' is terse to the point of being slightly clipped, but it still carries workflow value.

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?

There is no output schema, so the description is the only place to learn what a successful call returns or how to reference the new project in the follow-up build_plan/quote steps. The ordering advice is helpful but the handoff is left implicit, which is a meaningful gap for a create-then-chain tool.

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 coverage is 100%, so the baseline is 3. The description earns one more by clarifying precedence: title alone is sufficient at creation time and script can be supplied later via configure, which is a decision-level insight the schema's required-list does not spell out.

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 new Cinegenta project') and immediately scopes it: only a title is required. It also implicitly differentiates itself from siblings by noting that script content can be added later 'through configure', so an agent can tell create from update without comparing schemas.

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 explicit sequencing: create first with a title, defer script to configure, then build_plan and quote. That is real when-to-use guidance across siblings. It does not state exclusions (e.g., when to use list_projects or get_status instead), which keeps it short of a 5.

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