7 posts tagged with "agents"

Protocols · AI News

The MCP maintainers' current roadmap names a problem most people building agents have felt without measuring: a server's tool catalogue is charged to the model before anyone asks a question. Under Improved primitives, the post is blunt about it — "Connecting to a server with a hundred tools means the model pays for that entire surface before the user has asked a single question, and tool selection tends to get worse as the list grows."

What makes this worth reading is not the roadmap. It's that the fix is already written down, in the client documentation, alongside a warning that it can cost more than the problem it solves — and that warning gets far less attention than the fix it qualifies.

Agent Frameworks · AI News

In July the MCP specification ripped out sessions. We wrote at the time that the change was infrastructure, not changelog — that a stateless core would let servers sit behind ordinary load balancers and survive redeploys, and that clients would need to catch up.

Today LangChain caught up. MCP support moved out of the separate langchain-mcp-adapters package and into langchain itself, rebuilt on FastMCP, with two features the old spec made impossible: elicitation as a LangGraph interrupt, and a cacheable tool catalog.

We installed it the same afternoon and pointed it at a server we wrote against the new spec. The announcement is accurate. The ecosystem around it is not ready — and one of the gaps quietly converts a human-approval gate into a sentence the model invents.

Your agent can search the web. You write in the prompt: only use sec.gov and the big financial wires. It usually listens. The times it does not are the times you learn that a line in a prompt is a request, not a rule.

On 19 August AWS added site filters to the web search tool in Bedrock AgentCore. Small feature. But the way it handles a disagreement is worth knowing, because that is what makes it a guardrail instead of a note.

Someone posted spec-driven development on LinkedIn this week as the answer to vibe coding — to prompting an agent, half-understanding what you're building, and ending up with code you can't vouch for. The linked toolkit has 127,000 stars and comes from GitHub itself. The pitch lands.

So I installed it and pointed it at a deliberately trivial task. One of the three principles it wrote for me was a dependency policy I never asked for — hold that thought.

Twenty minutes isn't a verdict, though. Two engineers have tested this properly, on real problems, long enough for the seams to show. They used different tools, on different continents, seven months apart — and both reached for the same comparison, unprompted: the last time our industry tried to generate working code from documents. On the one question that decides whether any of this survives contact with AI features, they flatly contradict each other. Neither has a measurement.

Most "run it locally" model announcements come with an asterisk — smaller, weaker, a toy version of the real thing. Meta's newest release doesn't: Muse Glimmer, a 30B multimodal model built specifically for agentic work, fits on a single consumer GPU and beats larger models on the benchmarks that actually measure agent behavior.

In June 2026, the AI world got a new buzzword: loop engineering — roughly, disciplined design of a single agent's tool-calling loop. Six weeks later it was supposedly replaced by graph engineering — wiring up several agents at once — killed by twelve words that 3.1 million people saw:

Don't know what loop engineering is? Don't worry — neither did most of the people declaring it dead. Here are both terms, how a name became an obituary in six weeks, and the twist nobody checked before writing about it.

Protocols · AI News

The Model Context Protocol just had its biggest revision since launch. The 2026-07-28 specification doesn't add a feature — it rewrites how every MCP server talks to every client. If you've deployed an MCP server anywhere past "runs on my laptop," this one touches your infrastructure, not just your changelog.