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Professional notes by Craig Johnston
long-form, short-form, working drafts · since 2008
VOL. XIX · MMXXVI
140 NOTES IN PRINT

Tag: Agents

9 NOTES
CXXXV

An Instrument for MCP Agent Studies

The harness behind two DOI-archived benchmark reports, and why a study premise can be killed in one working day
MCPAIAGENTSDATA
2026-08-01
CXXXI

When Do Agents Use Stored Knowledge?

A benchmark that killed its own hypothesis: strong models re-derive what they can check, and a weak model trusts a stale note over the evidence in front of it
MCPAIAGENTSDATA
2026-07-26
CXXVIII

Does a Semantic Knowledge Layer Make an Agent Measurably Better?

A reproducible benchmark: 42.7% to 98.7% on knowledge-trap questions, and a platform that learns from empty
MCPAIAGENTSDATA
2026-07-22
CXXIV

The Agent Gateway to Your Platform: mcp-data-platform

An Apache-2.0 MCP server that gives frontier models access and grounded context to everything you built
KUBERNETESFOSSPLATFORMMCP
2026-07-15
CXV

When Your Tools Lie to the Agent

I drove my own platform as a real client and told it to find every place a tool said one thing and did another. A case study in MCP SDLC.
MCPGOAGENTSTESTING
2026-06-28
CXIII

Where Tribal Knowledge Goes

An insight an analyst shares mid-session becomes a reviewed, signed-off change to the catalog rather than vanishing when the conversation ends.
MCPAGENTSDATAAI
2026-06-26
CXI

Steering Agents Without Caging Them

Steering agents from the server middleware instead of the tool descriptions.
MCPGOAGENTSAI
2026-06-24
CIX

One Process, Many MCP Servers

Compose mcp-trino, mcp-datahub, and mcp-s3 as Go libraries behind one endpoint, instead of running three servers that can't see each other.
MCPGOAGENTSDATA
2026-06-22
CVII

Why I Build MCP Servers in Go, Not Python

An MCP server faces an agent on both sides. Go lets me leash the agent that writes it and harden the contract the agent reads.
MCPGOAIAGENTS
2026-06-19