langfuse-mcp-java

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

Annotations indicate destructiveHint=true and readOnlyHint=false, suggesting the operation modifies state (possibly consuming/removing the item from queue), but description only states 'Returns...' implying a safe read. Fails to explain what gets destroyed or the implications of openWorldHint=true.

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?

Generally concise with three clear sentences. The return value documentation is necessary given no output schema exists. Minor redundancy stating parameters are required when schema already enforces this.

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?

Documents return fields (id, queueId, traceId, etc.) which is valuable without an output schema. However, incomplete regarding destructive behavior implied by annotations and lacks guidance on error cases or side effects.

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% with clear descriptions. The description adds 'by queue ID and item ID' which maps parameters to the retrieval pattern, but otherwise repeats the required status already specified in schema's required array.

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?

Clearly states the tool returns a specific item by queue ID and item ID, distinguishing it from sibling 'list_annotation_queue_items' which returns multiple items. Specific verb and resource identified.

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?

No guidance provided on when to use this specific tool versus list_annotation_queue_items or other queue operations. Only states parameter requirements which are already evident in the schema.

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