CtrlK
BlogDocsLog inGet started
Tessl Logo

a2a-protocol

How agents call other agents via the A2A (agent-to-agent) JSON-RPC protocol. Use when enabling inter-agent communication, exposing agent skills to other agents, or calling external agents from scripts.

67

Quality

82%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Low

Low-risk findings.

1 low severity finding. Worth noting, but not necessarily harmful.

Low

W011: Third-party content exposure detected (indirect prompt injection risk).

What this means

The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.

Why it was flagged

SKILL.md describes an A2A client workflow where the caller sends free-form `text` to a remote agent via `callAgent()` / `client.send()` and the receiver then uses that message as LLM input for the remote agent run, so outsider-authored user/peer text can be fed into the agent context (and is explicitly treated as untrusted presentation when included in streamed/agent-activity updates).

Report incorrect finding
Repository
BuilderIO/agent-native
Audited
Security analysis
Snyk

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.