describe_table_schema
Get detailed table structure
Part of the Neon MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
WHEN AI AGENTS USE THIS TOOL
AI agents call describe_table_schema to retrieve information from Neon 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 DESCRIBE_TABLE_SCHEMA
Even though describe_table_schema 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:
describe_table_schema:
rules:
- action: allowSee the full Neon policy for all 29 tools.
DETAILS
MORE NEON TOOLS
complete_query_tuning Read describe_branch Read describe_project Read fetch Read get_connection_string Read get_database_tables Read get_doc_resource Read list_branch_computes 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 describe_table_schema tool do?
Get detailed table structure. It is categorised as a Read tool in the Neon MCP Server, which means it retrieves data without modifying state.
How do I enforce a policy on describe_table_schema?
Add a rule in your Intercept YAML policy under the tools section for describe_table_schema. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Neon MCP server.
What risk level is describe_table_schema?
describe_table_schema is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Can I rate-limit describe_table_schema?
Yes. Add a rate_limit block to the describe_table_schema 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 describe_table_schema completely?
Set action: deny in the Intercept policy for describe_table_schema. 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 describe_table_schema?
describe_table_schema is provided by the Neon MCP server (neondatabase/mcp-server-neon). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
ENFORCE POLICIES ON NEON
Open source. One binary. Zero dependencies.