AI Agent Tools Examples in 2026: 10 Real Implementations You Can Copy

10 concrete agent-tool examples: from web search to GitHub PR review, each with working code.

## AI Agent Tools Examples in 2026 Theory is cheap; working examples are not. These 10 agent-tool patterns come from production deployments described in public engineering blogs and open-source repos in 2026. ### 1. Web search tool (Tavily) [python] from langchain_community.tools.tavily_search import TavilySearchResults search = TavilySearchResults(max_results=5) [/python] ### 2. GitHub PR review tool The PR-Agent project (12,321 stars) wraps git commands as agent tools: git diff becomes a tool call, the LLM returns a structured review with severity ratings. ### 3. SQL query tool [python] from langchain_community.utilities import SQLDatabase db = SQLDatabase.from_uri("sqlite:///sales.db") [/python] ### 4. Calendar booking agent (MCP) Using the official Google Calendar MCP server, agents read availability and book slots via natural language. ### 5. Email triage tool A tool that lists unread mail, another that drafts replies, and a third that marks spam - three small tools beat one giant prompt. ### 6. PDF extraction (markitdown) Microsoft markitdown (30k+ stars) converts PDFs, DOCX, and slides to markdown so agents can read them. ### 7. Image generation tool [python] @tool def generate_image(prompt: str) -> str: return "image url from ComfyUI API" [/python] ### 8. Browser action tool (browser-use) browser-use (107,406 stars) exposes browser_use as a tool so agents can fill forms and click buttons on real sites. ### 9. Vector search tool [python] @tool def search_knowledge_base(query: str) -> list: return qdrant_client.query_points("docs", query=query) [/python] ### 10. Code execution sandbox E2B (13,210 stars) provides secure cloud sandboxes; agents write and run code without touching your host. ### Key lesson Small, single-purpose tools with clear docstrings outperform mega-tools. The LLM needs to know when to call each one. ### FAQ **Which example is easiest to start with?** The SQL tool and the vector search tool - both are under 10 lines. **Are tools safe by default?** No. Sandbox any code execution and add allow-lists to shell tools.