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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description adds return-content context ('clean Markdown text and extracted code blocks'), but says nothing about error behavior for unmatched identifiers, output size, or truncation.

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 the action and resource first and qualifying detail after; no filler. The inline parenthetical example is slightly redundant with the schema's own examples, preventing a 5.

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?

With no output schema, the description does the work of describing the return payload (full tutorial text plus extracted code blocks, or code-only when flagged). Parameters and safety annotations are covered, so only edge-case behavior (bad slug, oversized tutorials) is missing.

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 100%, so both parameters (identifier, code_only) are already fully documented, including the accepted identifier forms. The description largely restates the schema's identifier list and adds no new syntax or constraint detail, so 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?

States a specific verb (Fetch) plus the concrete resource (complete Markdown text and extracted code blocks of a kirupa.com tutorial). This clearly separates it from search_tutorials, list_sections, and find_related_links, though it never names those siblings explicitly.

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 — fetch full content once you already have an identifier — but there is no explicit when-to-use vs. alternatives guidance, e.g. that search_tutorials should be used first to discover a slug. No exclusions or prerequisites are stated.

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