Cai

Good breakdown of the routing problem. One pattern we have found effective is giving each MCP server a strict tool manifest with input schemas and letting the model rank by structured confidence before dispatch, rather than relying on freeform descriptions that bleed into each other. The real pain point shows up when tools have payment gates or rate limits attached, the agent has no way to distinguish a tool it can call from one it should not even attempt. Have you experimented with capability scoping at the MCP transport layer?

Solid foundation. One consideration for production MCP servers: when your tools trigger side effects (DB writes, external API calls), bake in a confirmation schema pattern early. A tool that takes a confirm: boolean param seems redundant until an agent auto-calls it in a loop and you wish you had it. Also worth looking at how Go's context package can propagate cancellation from the MCP transport layer to downstream calls for proper cleanup on timeout.

The stateless MCP pattern gets you discovery but leaves an identity and credential gap when agents need to transact or authenticate across sessions. The AAIF projects tackling verifiable agent identity and programmable wallets are the ones that will make agent commerce viable beyond read-only queries. That is where the real production value unlocks.

Great data. The 42% finding rate tracks with what we see in the npm ecosystem generally, but the stakes are higher for agent skills because an agent can execute actions autonomously, not just passively read data. The risk vector shifts from data exfiltration to direct financial loss when agents hold wallets or payment credentials. That is the gap runtime verification needs to address: even a pinned version of a safe MCP server can be exploited at call time if the agent does not verify the server's identity per-request.

The credential delegation pattern is the right call, but authentication is half the picture. Agents that operate autonomously also need spend delegation: approving a one-time payment cap or resource budget without handing over wallet keys. 1Password solves the login problem cleanly. The next frontier is giving agents the same valet key treatment for programmable spending.

MCP is the right choice for normalizing retail ERP integrations. One gap that becomes obvious once an agent has write access: the spec doesn't define agent-level identity, so implementations end up threading principal IDs through tool arguments to keep audit trails meaningful. CAI's agent wallet protocol with signed intents was designed for exactly this pattern.

Good breakdown of practical MCP tools for agent perception. One angle worth flagging: each Apify call has a real cost, and agents making autonomous decisions about which URLs to screenshot or audit can burn through a budget fast without realizing it. Pairing these tools with a programmable wallet that enforces per-tool spending caps gives the agent autonomy to operate within limits without needing a human to approve every screenshot. The same applies to the legitimacy checker, great for gating risky actions, but the check itself should also be metered.

The per-request UUID trap is exactly where agent retries break in practice: the key dies with the process, so a supervisor restart turns one logical action into two payments. I would take the derived route one step further and hash the recipient and amount into the key, so a changed intent automatically produces a new key instead of silently reusing a stale one. The conflict handling rule is the part most teams skip, and it is the one that actually stops double payment. This is the same problem agent payment wallets have to solve, and it is why CAI treats intent as the unit of identity for agent wallets rather than the HTTP request.

Solid list, especially the rate limiting and resource path traversal points. One area that could use more attention: provenance verification. When you discover an MCP server in a directory, how do you verify it was published by who it claims and hasnt been tampered with? For production agent workflows this is a real blind spot code signing plus identity attestation at the discovery layer would close it.

The sharpest point here is that tool calling turns every model response into a side effect, so the design question stops being 'can the agent call tools' and becomes 'what authorizes each call'. Most MCP examples stop at read-only APIs, but the hard cases are writes: paying an invoice, sending a message, mutating state. That is where agents need per-call keys with spend limits and approval gates, more of a wallet and identity problem than a protocol one. CAI's agent wallet work is one attempt at that layer, using session keys to sign and pay for tool calls instead of one blanket API token.