list_schema_fields
List schema fields for a dataset with filtering
Part of the DataHub MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
WHEN AI AGENTS USE THIS TOOL
AI agents call list_schema_fields to retrieve information from DataHub without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions — but you may still want rate limits to control API costs.
WHY ENFORCE A POLICY ON LIST_SCHEMA_FIELDS
Even though list_schema_fields only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
RECOMMENDED POLICY
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
tools:
list_schema_fields:
rules:
- action: allowSee the full DataHub policy for all 21 tools.
DETAILS
MORE DATAHUB TOOLS
search Read get_lineage Read get_dataset_queries Read get_entities Read get_lineage_paths_between Read get_me Read search_documents Read grep_documents Read SIMILAR READ TOOLS ON OTHER SERVERS
list_bases Airtable list_tables Airtable list_records Airtable get_record Airtable search_records Airtable search Amplitude RELATED READING
FREQUENTLY ASKED QUESTIONS
What does the list_schema_fields tool do?
List schema fields for a dataset with filtering. It is categorised as a Read tool in the DataHub MCP Server, which means it retrieves data without modifying state.
How do I enforce a policy on list_schema_fields?
Add a rule in your Intercept YAML policy under the tools section for list_schema_fields. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the DataHub MCP server.
What risk level is list_schema_fields?
list_schema_fields is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Can I rate-limit list_schema_fields?
Yes. Add a rate_limit block to the list_schema_fields 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 list_schema_fields completely?
Set action: deny in the Intercept policy for list_schema_fields. 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 list_schema_fields?
list_schema_fields is provided by the DataHub MCP server (mcp-server-datahub). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
ENFORCE POLICIES ON DATAHUB
Open source. One binary. Zero dependencies.