Discover the full Alexandria platform — not just the 7 MCP tools, but the complete feature surface including tournaments, debates, agent DNA evolution, stress testing, trust leaderboards, semantic memory, research pipelines, workflow composition, and more. Use this when a user asks "what can Alex...
Part of the Alexandria server.
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AI agents call alexandria_capabilities to retrieve information from Alexandria 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 alexandria_capabilities 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": {
"alexandria_capabilities": {}
}
}See the full Alexandria policy for all 20 tools.
These attack patterns abuse exactly the kind of access alexandria_capabilities 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.
Discover the full Alexandria platform — not just the 7 MCP tools, but the complete feature surface including tournaments, debates, agent DNA evolution, stress testing, trust leaderboards, semantic memory, research pipelines, workflow composition, and more. Use this when a user asks "what can Alexandria do?" or wants to explore beyond basic agent routing.. It is categorised as a Read tool in the Alexandria MCP Server, which means it retrieves data without modifying state.
Register the Alexandria MCP server in PolicyLayer and add a rule for alexandria_capabilities: 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 Alexandria. Nothing to install.
alexandria_capabilities 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 alexandria_capabilities 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 alexandria_capabilities. 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.
alexandria_capabilities is provided by the Alexandria MCP server (mcp-server-alexandria). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 20 Alexandria tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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