get_europepmc_paper_by_id

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

With no annotations, the description must carry behavioral transparency. It only adds 'without file saving', but does not disclose error handling, rate limits, authentication needs, or output structure. This is insufficient for a mutation-free 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 a single, front-loaded sentence, which is concise. However, it omits necessary details, making it borderline under-specified rather than efficiently complete.

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 output schema and annotations, and a single parameter, the description should cover accepted identifier formats and return structure. It does not, leading to significant gaps for correct invocation.

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 0%, and the parameter 'identifier' has no description. The tool description adds no meaning beyond the parameter name, leaving the agent to guess what types of identifiers are accepted (e.g., PMID, DOI, or Europe PMC ID).

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 it retrieves Europe PMC paper metadata and explicitly notes 'without file saving', distinguishing it from some sibling tools. However, it does not fully differentiate from tools that also return metadata, so it stops short of a 5.

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 is provided on when to use this tool vs. siblings like search_europepmc_papers, get_europepmc_full_text, or get_europepmc_pdf_as_markdown. The agent is left to infer context.

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