langfuse-mcp-java

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

The description frames the operation as a safe read ('Returns a paginated list'), but the annotations declare destructiveHint: true and readOnlyHint: false. This direct contradiction regarding whether the tool modifies/deletes data versus merely querying is a critical transparency failure that could mislead agents about operation safety.

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?

Four efficiently structured sentences progress logically from operation definition to return fields to usage context to pagination mechanics. Every sentence earns its place, though the field enumeration (id, provider, etc.) is slightly dense and could benefit from formatting separation.

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 an output schema, the description commendably details the structure of returned connection objects (listing fields like displaySecretKey and baseURL). It also establishes the domain context (Langfuse project, evaluations). Only minor gap is explicit differentiation from the upsert sibling.

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?

With 100% schema description coverage, the schema already fully documents both parameters (page and limit). The description reinforces that page is 1-based and limit controls page size, but adds no significant semantic detail beyond what the schema provides, meriting the baseline score for high-coverage schemas.

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 'Returns a paginated list of LLM provider connections configured in the Langfuse project', specifying the exact resource, the action (returns/list), and the scope. This effectively distinguishes it from the mutation-focused sibling 'upsert_llm_connection'.

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?

Provides domain context stating connections are used 'for evaluations and playground', implying when the tool is relevant. However, it lacks explicit guidance on when to use this list operation versus creating/updating connections via the sibling tool, or when pagination is necessary.

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