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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds some behavioral context by noting the instance is 'temporary' and 'anonymous' and that selections are revalidated through a 'public gate', implying a validation step. It says nothing about failure behavior, rate limits, or what the gate rejects, so the added value is modest.

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?

At two short sentences it is appropriately sized and front-loads the primary action. But the second sentence is a fragment whose meaning is unclear, so brevity comes at the cost of comprehension rather than through efficient phrasing.

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?

An output schema exists, so return values need not be described. Still, for a sync tool with a revision cursor, an ephemeral anonymous instance model, and a gating/revalidation step, the description omits the sync semantics, cursor behavior, and error conditions an agent needs to invoke it correctly.

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 0% and the description never mentions explorer_id or after_revision. For a cursor-style sync the after_revision parameter is behaviorally critical, yet neither the schema nor the description explains it. The description therefore fails to compensate for the coverage gap as required when coverage is under 50%.

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 gestures at a specific action (reading a new selection intent and revalidating it through a 'public gate'), which is more than a restatement of the name. However, 'selection intent' and 'public gate' are internal jargon an agent cannot map to a concrete operation or outcome, and nothing distinguishes this from siblings like catalogue_search or open_catalogue. Purpose remains vague.

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, no when-not-to-use, and no mention of any alternative sibling tool. An agent has no way to know whether catalogue_sync should be called instead of catalogue_search or open_catalogue, or in what sequence. Only the barest implied context (an existing explorer instance) is present.

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