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

Adds real behavioral context beyond the annotations: replacement never publishes new text, only publish_base exposes files, files are not auto-deleted, removal also cuts public access, and responses are private/no-store. The trust warning about uploaded text being untrusted data is valuable. Deduction because a large share of the text covers billing/subscription behavior irrelevant to invoking this tool.

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 first sentence is well front-loaded, but the rest is a grab-bag of account limits, post-expiry read/export rights, purchase flow, and privacy headers that mostly do not help an agent replace a document. Much of it is boilerplate that dilutes the two or three sentences that actually matter.

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 destructive, idempotent 5-parameter mutation with full schema coverage and no output schema, the description covers the key unknowns: it does not publish, does not delete, and treats uploaded text as untrusted. Only the exact success response and permission requirements are 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 description coverage is 100%, so the schema already documents base_id, document_id, filename, content, and the expected_sha256 409 conflict behavior. The description adds only that the text should have been reviewed before replacement, which is marginal on top of a fully documented 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?

"Replace your document after reviewing the new text" gives the verb (replace) and the resource (document), and later clarifies that replacement never publishes new text, which separates it from publish_base. However, "your document" is vague and there is no differentiation from the obvious sibling add_base_document, so the agent must infer that this overwrites an existing document_id rather than creating one.

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?

"After reviewing the new text" implies a precondition (read the current text first, consistent with expected_sha256), and the limits sentence hints at capacity preconditions. But there is no explicit "use this instead of add_base_document/remove_base_document when..." and no statement of required permissions or what to do on 409 beyond what the schema already says.

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