MCP Tool Reference Medium Risk

updateMock

Update a mock server

Part of the Postman MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

postmanlabs/postman-mcp-server Write

WHEN AI AGENTS USE THIS TOOL

AI agents use updateMock to create or modify resources in Postman. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

WHY ENFORCE A POLICY ON UPDATEMOCK

Without a policy, an AI agent could call updateMock repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Postman.

RECOMMENDED POLICY

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

postman.yaml 
tools:
  updateMock:
    rules:
      - action: allow
        rate_limit:
          max: 30
          window: 60

See the full Postman policy for all 30 tools.

DETAILS

Tool Name

updateMock

Category

Write

MCP Server

Postman MCP Server

Risk Level

Medium

MORE POSTMAN TOOLS

createApi Write
Create a new API
createCollection Write
Create a new collection
createEnvironment Write
Create a new environment
createMock Write
Create a mock server
createMonitor Write
Create a monitor
createWorkspace Write
Create a new workspace
updateApi Write
Update an API
updateCollection Write
Update a collection

View all 30 tools →

SIMILAR WRITE TOOLS ON OTHER SERVERS

create_table Airtable
Create a new table with fields
update_table Airtable
Update a table's name or description
create_field Airtable
Add a new field to a table
update_field Airtable
Modify an existing field
create_record Airtable
Add a new record
update_record Airtable
Modify an existing record

RELATED READING

FREQUENTLY ASKED QUESTIONS

What does the updateMock tool do?

Update a mock server. It is categorised as a Write tool in the Postman MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on updateMock?

Add a rule in your Intercept YAML policy under the tools section for updateMock. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Postman MCP server.

What risk level is updateMock?

updateMock is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit updateMock?

Yes. Add a rate_limit block to the updateMock rule in your Intercept 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 updateMock completely?

Set action: deny in the Intercept policy for updateMock. 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 updateMock?

updateMock is provided by the Postman MCP server (postmanlabs/postman-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

ENFORCE POLICIES ON POSTMAN

Open source. One binary. Zero dependencies.

VIEW ON GITHUB Full Postman policy →