MCP GitLab Server

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

With no annotations provided, the description carries full burden and does well by disclosing key behavioral traits: it returns 'Structured diff with smart chunking', has 'Context control, size limits', and is 'Better for large diffs'. However, it doesn't mention potential rate limits, authentication needs, or error conditions, leaving some behavioral aspects uncovered.

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 efficiently structured with clear sections (Returns, Use when, Features, Advantages, Related tools), uses bullet points for readability, and contains zero wasted sentences. Every element adds value, making it easy to scan and understand quickly.

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 moderate complexity (5 parameters, no output schema, no annotations), the description is quite complete: it explains purpose, usage context, advantages, and relationships to siblings. The main gap is the lack of output format details (what 'Structured diff' means exactly), but otherwise it provides strong contextual understanding.

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 schema description coverage is 100%, providing detailed documentation for all 5 parameters. The description adds minimal parameter semantics beyond the schema, only implying context lines and size limits through 'Features: Context control, size limits'. This meets the baseline of 3 since the schema does the heavy lifting.

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 tool's purpose as 'Get intelligent diff between refs' with specific features like 'smart chunking', 'context control', and 'size limits'. It distinguishes itself from siblings by explicitly comparing to 'gitlab_get_commit_diff: Simple commit diff' and 'gitlab_compare_refs: Basic comparison', establishing its specialized role.

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 explicit usage guidance with 'Use when: Need customizable diffs' and lists advantages over standard diff tools. It names specific alternatives ('gitlab_get_commit_diff', 'gitlab_compare_refs') and explains when this tool is better ('Better for large diffs', 'Configurable context lines', 'File size filtering').

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