Get metadata (name, type, size) of a specific attachment by its sys_id
AI agents call get_attachment_metadata to retrieve information from ServiceNow-MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about an attachment without modifying, deleting, or executing anything. It has minimal blast radius even if misused, as it merely exposes metadata that is typically already accessible to users with basic ServiceNow permissions. No reversible or irreversible changes are possible.
From the tool's definition Tool description states it 'Get[s] metadata (name, type, size) of a specific attachment' — a retrieval operation with no modification or side effects. The verb 'Get' and the limited scope (metadata only) confirm this is a read-only query.
Attacks that exploit this kind of access
Get metadata (name, type, size) of a specific attachment by its sys_id. It is categorised as a Read tool in the ServiceNow-MCP MCP Server, which means it retrieves data without modifying state.
Register the ServiceNow- 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. Nothing to install.
get_attachment_metadata is a Read tool with low risk. Read-only tools are generally safe to allow by default.
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.
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.
get_attachment_metadata is provided by the ServiceNow- MCP server (tedorigawa001/servicenow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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