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zscaler-mcp-server

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by zscaler

zcc_list_devices

Read-only

Retrieve ZCC device enrollment data from Zscaler Client Connector Portal with filters by username, OS, and pagination. Supports JMESPath client-side filtering.

Instructions

Retrieves ZCC device enrollment information from the Zscaler Client Connector Portal (read-only) Supports JMESPath client-side filtering via the query parameter.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
usernameNoUsername to filter by (e.g., 'jdoe@acme.com').
os_typeNoDevice operating system type: ios, android, windows, macos, linux.
pageNoPage number for paginated results.
page_sizeNoNumber of results per page. Default is 50. Max is 5000.
queryNoJMESPath expression for client-side filtering/projection of results.
serviceNoThe service to use.zcc

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

Annotations provide readOnlyHint. The description adds that it supports JMESPath filtering. No contradictions, and it adds useful behavioral context beyond annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two short sentences, no redundancy, front-loaded purpose, and second sentence adds important capability. Every word earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given schema, annotations, and output schema, the description is fairly complete. It explains the tool's purpose and filtering. Minor gap: no mention of pagination or result structure, but output schema compensates.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% with detailed parameter descriptions. The description only adds context about JMESPath filtering, not significantly enhancing individual parameter meanings beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool retrieves ZCC device enrollment information, with specific verb 'Retrieves' and resource. It mentions JMESPath filtering, distinguishing it from sibling tools like zcc_get_device_otp or zcc_list_forwarding_profiles.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description indicates it is a read-only tool and supports client-side filtering, but does not explicitly tell when to use this tool over siblings or provide exclusion criteria.

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

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