Loading ToolBench
Two tools with minimal parameter descriptions and no documented output schemas. Tool names follow verb_noun convention (fetch_url, post_data) but descriptions lack context for LLM selection. Parameters are present but largely undescribed. No error recovery guidance, no output structure documentation, and no indication of destructive vs. read-only semantics in the tool definitions themselves (only inferred from name). Tool composition is reasonable (each does one thing), but descriptions fall short of production baseline (194 chars average; these are 55-65 chars). No input validation rules documented in parameter descriptions.
Fetch content from a URL via HTTP GET request
Send data via HTTP POST request
Tool descriptions lack WHEN/WHY guidance. 'Fetch content from a URL via HTTP GET request' is 55 chars, below the 10 - 1024 baseline. Missing: What is this for? When to use vs. alternatives? Are there prerequisites? LLMs cannot infer context from short descriptions.
No output schema documented. Tools return content as free-text JSON string. LLMs need structured response definitions to plan downstream calls and extract typed fields. Without documented output, LLMs must guess at response structure.
Input parameters lack descriptions. The 'data' parameter in post_data has description 'Data to send in POST body' (39 chars), but does not explain format requirements (JSON object), nesting depth, field constraints, or size limits. Parameter descriptions should reach 72 chars baseline.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-22 | F | 49 | 2026-07-28+ | v2 |
| 2026-03-09 | F | 33 | - | v1 |
No error recovery guidance. Error responses return 'Error fetching URL: <error message>' and 'Error posting data: <error message>', but do not guide the LLM on next steps. Should state: is this retryable? Should the user adjust the URL? What are common failure modes?
No tool annotations (readOnlyHint, destructiveHint, idempotentHint). fetch_url is read-only; post_data is destructive/stateful. These semantics must be declared in the tool definition so agents know which calls are safe to retry and which have irreversible consequences.
No input validation rules documented. The 'url' parameter accepts any string, but does not state: must be a valid HTTP(S) URL; no file:// or custom schemes; max length; character restrictions. LLMs will pass invalid URLs and waste a call on failure.
No pagination or result limiting. fetch_url can return unbounded response bodies (entire web page). If a page is 10MB, the response exhausts context and causes downstream reasoning to degrade. Should cap at 100KB or provide streaming.