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

Annotations already declare readOnlyHint, openWorldHint and destructiveHint=false, so safety is covered. The description adds genuinely useful context the annotations don't: the measurement originates from the DotMoose network in Canada, is capped at 20 hops, and sends three probes per hop — details that shape how the agent interprets results.

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?

A single, front-loaded sentence with no padding. The vantage point and hop/probe limits are stated efficiently, though a short clause naming traceroute as the alternative would have been worth the extra words.

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, the description should say more about what comes back (hop list, latencies, loss) than it does. It also omits the family parameter and any differentiation from looking_glass_traceroute, so it is adequate but leaves real gaps for a network-diagnostic tool.

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 description coverage is 0%, so the description carries the full burden. It clarifies that 'target' is a public host or IP address, but it never mentions the 'family' parameter (IPv4 vs IPv6), leaving one of two parameters entirely undefined in both schema and description.

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?

States a specific verb ('sample the route') and resource (path from the DotMoose network in Canada to a public host/IP), which an agent can grasp immediately. However, it never distinguishes itself from the sibling looking_glass_traceroute, which sounds functionally identical, so the agent cannot tell the two apart from the description alone.

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?

There is no guidance on when to use this versus looking_glass_ping or looking_glass_traceroute, no prerequisites, and no exclusions. The agent must infer that 'path' is the route-tracing variant of the three looking-glass tools.

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