Unity MCP Server

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the action 'Read' but doesn't disclose any behavioral traits such as whether this requires specific permissions, what happens if files are missing, the format of returned content, or any rate limits. The description is minimal and lacks essential context for a read operation.

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 with a single sentence that directly states the action and resources. It is front-loaded with the primary purpose and includes the optional parameter context efficiently. There is no wasted language, making it highly effective in brevity.

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 lack of annotations and output schema, the description is incomplete for a tool that reads files. It doesn't explain what is returned (e.g., file content, metadata, error handling), any prerequisites, or how it integrates with the context of agent development. For a read operation with no structured support, more descriptive context is needed.

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 100% description coverage, with the single parameter 'include_repo_understanding' clearly documented in the schema. The description mentions this parameter implicitly ('optionally REPO_UNDERSTANDING.md'), adding minimal semantic value beyond what the schema provides. With high schema coverage, the baseline score of 3 is appropriate as the description doesn't significantly enhance parameter understanding.

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 'Read' and specifies the exact files to be read: 'agent development guide (.agents/AGENT.md)' and optionally 'REPO_UNDERSTANDING.md'. This distinguishes it from siblings like 'get_project_info' and 'list_build_scenes' which handle different resources. However, it doesn't explicitly state the purpose beyond reading files (e.g., for what context or goal).

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 provides no guidance on when to use this tool versus alternatives. It mentions the optional inclusion of REPO_UNDERSTANDING.md but doesn't explain when that might be beneficial or how this tool relates to sibling tools like 'get_project_info' or 'list_build_scenes'. There is no explicit when/when-not or alternative usage context.

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