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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, covering the safety profile. The description adds that the tool is a fixed endpoint and requires a header channel resolved internally, which is useful but minimal. It does not contradict annotations, but it provides limited additional behavioral context.

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 description is unnecessarily verbose and repetitive. It includes boilerplate like 'Dedicated HGRApi tool for GET...' and 'Search terms: listing listingscountperchannel', which do not aid understanding. The core information could be conveyed in one clear sentence.

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?

Given the presence of an output schema, the description need not detail return values. However, it lacks meaningful usage guidance relative to siblings, and the boilerplate language reduces clarity. It covers basic input and output context adequately but falls short of fully helping an agent select and invoke the tool 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 100%, and the single parameter (channelOAuthId) is fully documented in the schema. The description repeats that the header channel is the current ChannelOAuthId, adding no new meaning or format details. A baseline of 3 is appropriate when the schema does the heavy lifting.

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 specifies the operation (get listings count per channel) and gives context (bulk publication and publication tracking). It distinguishes the tool from a generic endpoint caller. However, it does not differentiate it from similar siblings like hgr_get_listings or hgr_get_active_listings, leaving ambiguity about when this count-only view is preferred.

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?

The 'Use when' section merely restates the purpose ('run the listings count per channel operation for bulk publication and publication tracking') without providing concrete conditions or alternatives. No guidance is given on when to use this tool versus other listing-related tools in the sibling set.

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