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

The annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds only the content inventory, saying nothing about freshness, caching, or size of the returned context; with annotations carrying the safety burden that is an acceptable but modest contribution.

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?

Two short sentences with zero filler: the content inventory is front-loaded and the usage directive follows it. Nothing could be removed without losing information.

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 one-parameter, read-only lookup with no output schema, the description tells the agent what fields the result will contain (stack, package manager, commands, risks), which is the key missing piece. It is close to complete, with only return format and scope limits left implicit.

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 single 'repo' parameter is fully documented in the schema, including an example and a pointer to list_repos. The description adds no further parameter meaning, so the baseline 3 applies.

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 names the resource (repo) and enumerates the returned contents ('Stack, package manager, key commands, and known risks'), which is specific enough for an agent to know what it gets back. It does not explicitly contrast with siblings like get_relevant_warnings, so it falls 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?

'Call before starting work' gives an explicit trigger condition for invocation, which is stronger than implied usage. It stops short of naming when-not-to-use or pointing at alternatives such as get_relevant_warnings or search_memory.

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