get_concept
Each Greenlit book answers one named question (its concept, for example: the green lie). Returns the concept's question, short answer, and full explanation with its book. If the slug is unknown, returns the list of all concept slugs.
This record as markdown: /tools/com-greenlitbooks-catalog/get-concept.md
What get_concept does on Greenlit Books
AI agents call get_concept to retrieve information from Greenlit Books without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
slug | string | Yes | The concept slug, e.g. the-green-lie. |
Parameters from the server's own tool schema.
Why get_concept is rated Low
Even though get_concept only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs get_concept safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Greenlit Books, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_concept, this is the rule to start with:
get_concept is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Greenlit Books, apply this rule, and every get_concept call is checked against it from then on.
Questions about get_concept
Each Greenlit book answers one named question (its concept, for example: the green lie). Returns the concept's question, short answer, and full explanation with its book. If the slug is unknown, returns the list of all concept slugs. It is categorised as a Read tool in the Greenlit Books MCP Server, which means it retrieves data without modifying state.
get_concept accepts 1 parameter: slug. Required: slug. The full parameter table on this page comes from the server's own tool schema.
Register the Greenlit Books MCP server in PolicyLayer and add a rule for get_concept: 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 Greenlit Books. Nothing to install.
get_concept 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_concept 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_concept. 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_concept is provided by the Greenlit Books MCP server (https://greenlitbooks.com/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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