http_ping

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

With no annotations provided, the description carries the full burden. It discloses that the tool sends multiple requests and returns per-request latency and statistics (average, min, max, p95, success rate). It does not discuss error handling, side effects on the target, or what counts as a success, but the return behavior is well specified, which is sufficient for this non-destructive network diagnostic tool.

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 extremely concise: two sentences, front-loaded with the primary purpose, followed by a compact list of outputs. Every word contributes value with no repetition or filler.

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?

For a tool with 3 parameters, no output schema, and no annotations, the description is largely complete. It explains what the tool does, what it returns, and the statistical aggregates. It does not mention failure handling or edge cases, but given the simplicity and the sibling tool context, it provides enough for an agent to invoke it correctly.

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%, and the schema already documents all three parameters (url, count, timeout_ms) with descriptions. The tool description does not add meaning beyond the schema; it neither explains the parameters further nor clarifies their interplay. Baseline 3 applies because the schema does the heavy lifting.

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's purpose: to measure HTTP response time to a URL over multiple requests. It uses specific verbs ('measure') and a specific resource ('HTTP response time'), and the scope ('over multiple requests') distinguishes it from sibling tools such as dns_lookup or whois_lookup.

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?

The description implies usage for HTTP latency measurement but gives no explicit when-to-use guidance or exclusions relative to sibling tools. There is no mention of alternatives or conditions that would favor http_ping over dns_lookup, ssl_check, etc. The context is clear but it lacks explicit usage direction.

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