SerpAPI (Composio MCP) — agentic threat model
This agent acts as an intermediary to SerpAPI, presenting a moderate risk profile primarily driven by the ingestion of untrusted search-engine content which serves as a vector for indirect prompt injection, combined with the management of API credentials.
OWASP AIVSS score rationale
| Autonomy of Action | 0.30 | |
| Goal-Driven Planning | 0.20 | |
| Self-Modification | 0.00 | |
| Dynamic Tool Use | 0.40 | |
| Persistent Memory | 0.10 | |
| Contextual Awareness | 0.50 | |
| Dynamic Identity | 0.30 | |
| Multi-Agent Interactions | 0.20 | |
| Non-Determinism | 0.40 | |
| Opacity & Reflexivity | 0.30 |
Scored with the canonical OWASP AIVSS formula (AIVSS calculator reference); agentic risk factors estimated from the agent’s described capabilities.
MAESTRO 7-layer threat model
Per-layer threats for this agent. Layers tagged “not certain from listing” are general, caveated commentary where the public description didn’t pin that layer.
Not certain from the listing — The underlying foundation model is not specified as this is an MCP tool connector; however, the model executing these tools is highly vulnerable to indirect prompt injection via malicious search results returned by SerpAPI.
Data operations are transient, focusing on fetching and structuring search engine results (JSON). The primary threat is data poisoning of the active context window via untrusted external search index content.
The agent framework utilizes the Model Context Protocol (MCP) to expose search tools. Vulnerabilities include insecure tool integration if the calling agent blindly executes instructions embedded in the structured JSON search results.
Infrastructure risk centers on Composio's hosting environment which manages and stores the SerpAPI connection keys. Compromise of this layer could lead to API key exposure or unauthorized search queries.
Not certain from the listing — There is no mention of built-in guardrails, logging, or anomaly detection to filter out malicious payloads or prompt injection attempts hidden within the retrieved search results.
Composio handles authentication and managed API keys, providing a centralized control plane for access, though specific compliance standards or authorization policies are not detailed in the listing.
As an MCP tool, this agent is designed to be called by other orchestrator agents, introducing risks of cascading failures or tool-misuse if an upstream agent is compromised or manipulated.
MAESTRO — the 7-layer agentic threat-modeling framework (Cloud Security Alliance / Ken Huang).