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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered without the description. The description adds a small amount of context beyond that: "as it is now" signals the returned content reflects current state including prior edits, rather than a template or original. It says nothing about size limits, truncation, or what the payload looks like, which a raw-HTML read tool could reasonably disclose.

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 short sentence with no filler, and the key qualifier ("as it is now") is placed where it will be read. It is efficient rather than padded, though the terseness borders on under-specification for an agent that has many similarly named siblings.

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?

The tool is structurally trivial (one documented, required parameter) and its safety characteristics are fully declared by annotations, so little description is required. The only meaningful gap is that no output schema exists and the description does not characterize the return value (raw HTML text vs. parsed content), which an agent would want to know before calling it.

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% for the single document_id parameter, so the schema carries the parameter documentation burden. The description does not mention document_id, its format, or where ids come from (list_documents/open_work), so it adds no meaning beyond the schema. Baseline 3 is appropriate for a one-parameter tool with full schema coverage.

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?

"Read index.html as it is now" gives a verb (read) and a resource (the landing page's index.html), and "as it is now" hints at current on-disk state. However, it never says what a "landing page" document is or that the read targets the document identified by document_id, leaving the object of the read semi-cryptic. It does implicitly distinguish itself from landing_write_page/landing_edit_page by being the read side, but not from landing_look_at.

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 when-to-use guidance and no named alternative. With siblings landing_look_at (likely visual inspection), landing_research, and landing_edit_page, an agent is left to guess which one to call to inspect the current page. The phrase "as it is now" implies post-edit inspection but this is inference, not stated guidance.

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