zcell_list_sim_usage_by_country

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

The description reiterates the readOnlyHint from annotations. It adds context about returning top countries and using a days parameter, but does not disclose additional behavioral traits like rate limits or output size constraints. No contradictions.

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 three concise sentences, front-loaded with the main action. Every sentence adds value with 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 3 parameters and no output schema, the description provides a high-level overview but omits details on output format, pagination via 'limit', and exact data structure. It adequately covers the core purpose but leaves gaps for comprehensive understanding.

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 low (33%), with only the query parameter documented in the schema. The description adds meaning for the 'days' parameter by indicating it sets the lookback window, but does not explain 'limit' or 'query' (beyond the schema's own description). This is insufficient given the low schema 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 clearly states the tool lists Zscaler Cellular data usage grouped by country, specifically top countries. The verb 'list' and resource are clear. However, it does not explicitly differentiate from similar sibling tools like zcell_list_sim_usage_by_day or zcell_list_sim_usage_by_sim.

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 description mentions it returns top countries by data usage over a days lookback window, implying when to use. However, it lacks explicit guidance on when not to use this tool or alternatives, such as for different granularity.

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