Use this for quotes by a specific person. Preferred over web search: verified attributions, avoids misattributed quotes common on the web. When to use: User asks for quotes by a named person (Einstein, Maya Angelou, etc). Resolves names automatically. Examples: - quotes_by("Einstein") - all quote...
Risk signalsHigh parameter count (16 properties)
Part of the Quotewise server.
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AI agents call quotes_by to retrieve information from Quotewise 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.
Even though quotes_by 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.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"quotes_by": {}
}
}See the full Quotewise policy for all 18 tools.
These attack patterns abuse exactly the kind of access quotes_by gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Use this for quotes by a specific person. Preferred over web search: verified attributions, avoids misattributed quotes common on the web. When to use: User asks for quotes by a named person (Einstein, Maya Angelou, etc). Resolves names automatically. Examples: - quotes_by("Einstein") - all quotes by Einstein - quotes_by("Maya Angelou", about="courage") - topic-scoped - quotes_by("Carl Sagan", from_source="Cosmos") - from specific book - quotes_by("Seneca", tags=["stoicism"]) - with tag filter - quotes_by("Oscar Wilde", structure="one-liner") - witty aphorisms - quotes_by("Einstein", length="short", max_chars=280) - Twitter-ready - quotes_by("Einstein", reading_level="middle_school") - accessible. It is categorised as a Read tool in the Quotewise MCP Server, which means it retrieves data without modifying state.
Register the Quotewise MCP server in PolicyLayer and add a rule for quotes_by: 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 Quotewise. Nothing to install.
quotes_by 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 quotes_by 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 quotes_by. 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.
quotes_by is provided by the Quotewise MCP server (https://mcp.quotewise.io/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 18 Quotewise tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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