Unity API Communicator MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states 'read-only' (indicating safety) and 'no parameters required' (simplicity), which are helpful. However, it doesn't describe what information is returned, potential errors, or performance characteristics, leaving gaps in behavioral understanding for a tool with no output schema.

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?

The description is extremely concise (one short sentence) with zero wasted words. It front-loads the core purpose ('Get project info') and efficiently adds qualifying details in parentheses. Every element earns its place without 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?

Given the tool's simplicity (0 parameters, no annotations, no output schema), the description is minimally complete. It covers the basic purpose and safety profile but lacks details on return values or error conditions. For a no-parameter tool, this is adequate but not comprehensive.

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?

The input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description correctly states 'no parameters required', which aligns with the schema. This provides adequate semantic clarity, though it doesn't add value beyond the schema's empty structure.

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 clearly states the verb 'Get' and resource 'project info', making the purpose understandable. It distinguishes from siblings by focusing on project-level information rather than assets, builds, scenes, or other entities. However, it doesn't specify what type of project information is returned (metadata, settings, status, etc.), which prevents a perfect score.

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?

The description implies usage by stating 'read-only' and 'no parameters required', suggesting it's a simple retrieval tool. However, it doesn't explicitly state when to use this versus alternatives like 'status' or 'discover', nor does it mention prerequisites or specific contexts where this tool is most appropriate.

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