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zscaler-mcp-server

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by zscaler

zia_get_gre_tunnel

Read-only

Retrieve details of a specific GRE tunnel in Zscaler Internet Access using its unique identifier.

Instructions

Get a single ZIA GRE tunnel by ID.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
tunnel_idYes
Behavior2/5

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

Annotations already declare readOnlyHint=true, but the description adds no behavioral context such as error handling, ID format, or response structure. It merely restates the purpose.

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?

The description is a single, front-loaded sentence with no unnecessary words. It efficiently communicates the core action.

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

Completeness3/5

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

The tool is simple with one required parameter and no output schema. The description is minimal but not entirely lacking. It could be improved by indicating the response type or error conditions, but for such a straightforward GET tool, it is minimally viable.

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

Parameters2/5

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

Schema description coverage is 0%. The parameter 'tunnel_id' is only mentioned implicitly ('by ID') without explaining its format, how to obtain it, or any constraints. The description does not compensate for the schema's lack of parameter documentation.

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 action ('Get'), resource ('ZIA GRE tunnel'), and method (by ID). It is specific and distinguishes from sibling 'zia_list_gre_tunnels' which lists all tunnels.

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

Usage Guidelines2/5

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

No guidance on when to use this versus alternatives like 'zia_list_gre_tunnels' for listing all tunnels. No exclusions, prerequisites, or context provided.

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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