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

The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful context about which file types can be read and that pack.md returns the whole pack, but it does not describe error behavior, permissions, or return format.

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 front-loaded with the core action and uses two efficient sentences. The long list of file examples is useful but slightly dense, preventing a perfect score.

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 simple two-parameter read tool with full schema coverage and annotations covering safety, the description supplies enough context about valid path values and the special pack.md case. It does not explain return values or missing-file behavior, but the core usage is adequately covered.

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%, so the baseline is 3, but the description adds meaningful path examples beyond the schema's single PRODUCT.md example, including AGENTS.md, BRIEF.md, obligations.toml, assumption files, symbolon.toml, examples.jsonl, and pack.md. It does not add further meaning for the pack parameter beyond the schema.

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 gives a specific verb and resource — "Read one file of a pack" — and lists concrete file examples such as PRODUCT.md, AGENTS.md, and pack.md. It is clear what the tool does, but it does not explicitly distinguish itself from siblings like get_pack or search_packs.

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 is implied by the file examples and the note that pack.md is the whole pack as one Markdown page. However, there is no explicit guidance on when to use this tool versus get_pack, search_packs, or read_decisions.

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