zia_get_url_category_predefined

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

The annotations (readOnlyHint=true, openWorldHint=false) already communicate the safe read-only nature. The description adds modest context about the resource being Zscaler-curated and predefined, but does not disclose matching behavior, output characteristics, or error conditions. It neither contradicts nor significantly extends the annotations.

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?

One concise, front-loaded sentence with no filler. Every word adds meaningful context about the resource type and lookup key.

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?

This is a simple one-parameter, read-only getter with no output schema, so a short description is adequate. It explains the operation and the accepted lookup value. It could mention what the returned category object contains, but the low complexity makes that omission acceptable.

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 coverage is 0%, so the description must compensate for the bare 'name' parameter. It does clarify that the parameter can be either an ID or a display name, which is useful. However, it never explicitly maps the schema property 'name' to this dual role or provides examples/format details, leaving some ambiguity.

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 a specific verb ('Get') and a clearly defined resource ('Zscaler-curated predefined URL category'), and specifies lookup by either ID or display name. This distinguishes it from sibling tools like zia_list_url_categories (listing) and zia_get_url_category (likely custom categories).

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 word 'predefined' implies this tool is for Zscaler-curated categories rather than custom ones, but the description never explicitly names alternatives or states when not to use this tool. Usage context is implied rather than instructed.

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