get_trial_details

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

With no annotations, the description carries the full burden. It transparently lists the types of data returned (overview, eligibility, sites, results) and the hyperlink feature. It does not mention error handling, rate limits, or whether it requires authentication, but for a read-only retrieval tool, the level of detail is good.

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 two sentences: the first states the core purpose, the second lists what's included. No redundant phrases, every word adds value. It is front-loaded and easy to parse.

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 no output schema and low complexity, the description covers the main return data points adequately. It could mention data source or behavior on missing NCT ID, but for a single-parameter retrieval tool, it is sufficiently complete.

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 already fully describes the single parameter (nct_id with example and case-insensitivity). The description does not add additional semantics beyond restating that it's by NCT ID. Since schema coverage is 100%, the baseline of 3 is appropriate.

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 retrieves a full structured summary of one clinical trial by NCT ID. It lists the specific components returned (overview, eligibility criteria, site locations, results), which distinguishes it from siblings like search_trials (multiple trials) or compare_trials (comparison). The mention of an NCT ID hyperlink adds value.

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?

Usage context is implied: use when you have an NCT ID and want a detailed summary. However, the description does not explicitly state when to use this over siblings (e.g., search_trials for broad search, get_trial_results for results only). No exclusions or alternatives are mentioned.

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