get_attachment_metadata

Get metadata (name, type, size) of a specific attachment by its sys_id

SERVERServiceNow MCP Server SOURCE@aartiq/servicenow-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/servicenow-mcp-server/get-attachment-metadata.md

WHAT IT DOES

What get_attachment_metadata does on ServiceNow MCP Server

AI agents call get_attachment_metadata to retrieve information from ServiceNow MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_attachment_metadata is rated Low

This tool only retrieves and returns metadata about an existing attachment; it does not modify, delete, or execute any operations. The blast radius of misuse is minimal—an agent could learn details about attachments but cannot alter, access file contents, or trigger external actions. Classified as Read with low severity.

From the tool's definition Tool retrieves attachment metadata (name, type, size) by sys_id. The verb 'Get' and explicit mention of metadata retrieval indicate read-only query behavior with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_attachment_metadata safely

PolicyLayer is an MCP gateway: it sits between your AI agents and ServiceNow MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_attachment_metadata, this is the rule to start with:

get_attachment_metadata Allowed

get_attachment_metadata is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_attachment_metadata": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ServiceNow MCP Server, apply this rule, and every get_attachment_metadata call is checked against it from then on.

FAQ

Questions about get_attachment_metadata

What does the get_attachment_metadata tool do? +

Get metadata (name, type, size) of a specific attachment by its sys_id. It is categorised as a Read tool in the ServiceNow MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_attachment_metadata? +

Register the ServiceNow MCP Server MCP server in PolicyLayer and add a rule for get_attachment_metadata: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches ServiceNow MCP Server. Nothing to install.

What risk level is get_attachment_metadata? +

get_attachment_metadata is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_attachment_metadata? +

Yes. Add a rate_limit block to the get_attachment_metadata rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block get_attachment_metadata completely? +

Set action: deny in the PolicyLayer policy for get_attachment_metadata. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides get_attachment_metadata? +

get_attachment_metadata is provided by the ServiceNow MCP Server MCP server (@aartiq/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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