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

With annotations providing no safety hints (readOnly, idempotent, etc.), the description carries the transparency burden. It discloses operational details: the mutation nature, specific fields, return value, API key requirement, and cost. It does not mention potential destructive consequences (e.g., replacing entire lists) but the schema covers that, so it is reasonably transparent.

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 two sentences, front-loaded with the action and resource, and efficiently packs in the update types, partial-update guidance, API key requirement, return format, and cost. No wasted words.

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 tool has no output schema, the description appropriately includes the return shape ({ updated, config }). It also covers prerequisites and cost. With five optional parameters fully documented in the schema, no critical gaps remain.

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 structured descriptions already document each parameter. The description adds high-level context (e.g., 'send only fields to change') but does not add per-parameter detail beyond the schema, matching the baseline for full 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?

The description uses the specific verb 'Update' and clearly identifies the resource 'PingShield' while enumerating the exact attributes that can be changed (reputation threshold, whitelist/blacklist, shield message, pause/resume). This distinguishes it from sibling tools like x711_ping_shield_status and x711_ping_shield_check.

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 instruction to 'Send only the fields you want to change' clarifies the partial update model, and 'Requires API key' sets a prerequisite. However, it does not explicitly state when to avoid this tool or mention alternatives, so it falls short of a 5.

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