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 the tool logs messages and supports three types, but doesn't mention whether this requires specific permissions, whether logs persist across sessions, what happens if the console isn't available, or any rate limits. For a write operation with zero annotation coverage, this is insufficient.

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 a single, efficient sentence that front-loads the core purpose and includes essential supporting detail about log types. Every word earns its place with zero waste.

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 simple 2-parameter write tool with no annotations and no output schema, the description covers the basic purpose and parameter types adequately. However, it lacks behavioral context (like side effects or constraints) that would be important for safe usage, leaving gaps in completeness.

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 100%, so the schema already fully documents both parameters (message and type with enum values). The description adds no additional parameter semantics beyond what's in the schema, such as message length limits or type-specific behaviors. Baseline 3 is appropriate when schema does all the work.

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 specific action ('Log a message') and target resource ('to the Unity Console'), and distinguishes it from sibling tools like console_clear, console_errors, and console_logs by focusing on writing rather than reading or clearing operations.

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 context by mentioning the supported log types (Log, Warning, Error), but doesn't explicitly state when to use this tool versus alternatives like console_errors (which likely reads errors) or console_logs (which likely reads logs). No explicit when-not-to-use guidance is provided.

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