List all available block types in flompt with their descriptions. Useful to know which types to use when manually crafting blocks to pass to compile_prompt. Returns: Description of each block type and the recommended canonical ordering.
AI agents call list_block_types to retrieve information from Flompt without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and returns static metadata about available block types used in the prompt builder system. It performs no modifications, deletions, or external operations—it simply queries and returns reference information. This is a classic Read operation with minimal security risk.
From the tool's definition Tool is named 'list_block_types' and description states it 'List all available block types' and 'Returns: Description of each block type'. This is a query/information retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_block_types gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Flompt, and nothing reaches the server without passing your rules. This is the rule we recommend for list_block_types:
{
"version": "1",
"default": "deny",
"tools": {
"list_block_types": {}
}
}list_block_types is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all available block types in flompt with their descriptions. Useful to know which types to use when manually crafting blocks to pass to compile_prompt. Returns: Description of each block type and the recommended canonical ordering. It is categorised as a Read tool in the Flompt MCP Server, which means it retrieves data without modifying state.
Register the Flompt MCP server in PolicyLayer and add a rule for list_block_types: 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 Flompt. Nothing to install.
list_block_types 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 list_block_types 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 list_block_types. 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.
list_block_types is provided by the Flompt MCP server (nyrok/flompt). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 3 Flompt tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
3 Flompt tools catalogued and risk-classified — across an index of 42,500+ MCP servers.