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

Annotations already declare readOnly, openWorld, idempotent, and non-destructive. Description adds the output format (Markdown or stripped text) and the 40,000-character limit, which are useful behavioral details not in annotations. It doesn't describe error handling or authentication, but for a read-only tool with strong annotations, this is sufficient.

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?

One sentence with no filler. Front-loaded with the verb and resource, and includes essential constraints (domain, format, character limit). Every word earns its place.

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 a single parameter and no output schema, the description covers the core behavior, output format options, and a limit. It doesn't mention potential errors or how the format is chosen, but given simplicity and strong annotations, it's reasonably complete. Could be improved by clarifying whether both formats are returned or one is selected.

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 0%, so description must compensate. It does add domain restriction ('blacklattec.com') and implies the url should point to a page. However, it doesn't explain the output format selection (Markdown vs stripped text) or any additional constraints on the URL beyond being a URI. It provides some semantic value but leaves ambiguity.

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?

Clear verb 'Read' + specific resource 'one https://blacklattec.com page' with output format and limit. Distinguishes from siblings (search_pages for searching, site_info for site metadata) by focusing on fetching a single page's content given a URL.

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?

Purpose is clear enough to imply usage: use when you have a specific URL and want page content. However, it doesn't explicitly mention when to use search_pages or site_info instead, or any prerequisites (e.g., must have a valid URL from the domain). No exclusions or alternative guidance, but the domain restriction and action give enough context.

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