Find old ECS task definitions not used by any service.
AI agents call find_old_ecs_task_definitions to retrieve information from AWS FinOps MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists ECS task definitions that are no longer in use. It performs no modifications, deletions, or side effects—it only queries AWS to identify unused resources for cost optimization analysis. This is a pure Read operation consistent with the other sibling tools on this server (find_asgs_with_old_amis, analyze_* functions) which all perform non-destructive discovery and analysis.
From the tool's definition Tool name 'find_old_ecs_task_definitions' and description 'Find old ECS task definitions not used by any service' indicate a query/discovery operation that retrieves information about unused ECS resources without modifying or deleting them.
Attacks that exploit this kind of access
Find old ECS task definitions not used by any service. It is categorised as a Read tool in the AWS FinOps MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AWS FinOps MCP Server MCP server in PolicyLayer and add a rule for find_old_ecs_task_definitions: 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 AWS FinOps MCP Server. Nothing to install.
find_old_ecs_task_definitions 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 find_old_ecs_task_definitions 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 find_old_ecs_task_definitions. 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.
find_old_ecs_task_definitions is provided by the AWS FinOps MCP Server MCP server (prashantgupta123/aws-pillar-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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