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Linked API

by io.github.Linked-API
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sync_inbox

Recommended first step before reading messages. Enable whole-inbox monitoring so every incoming conversation can be polled with get_inbox (st.syncInbox action). Run once per account, before sending messages whose replies you want to read; only messages that arrive after it is enabled are captured.

Linked API actions are queued into a cloud-browser workflow and may take several minutes. The server returns immediately after starting the workflow with {status: 'pending'|'running', pendingReason, workflowId, operationName, message}. To retrieve the final result, call get_workflow_result with the returned workflowId and operationName — it will long-poll until completion or the request budget elapses, then return either the final result or another in-progress snapshot. Do not retry the original tool while a workflow is still running; that creates duplicate queued work.

A pending workflow carries pendingReason: 'queued' means it is waiting its turn behind other work on the same account and will start within minutes. 'outsideWorkingHours' means the account has configured working hours and the workflow is parked until they reopen — possibly the next working day. In that case get_workflow_result returns immediately instead of polling, message states when the window opens, and you should report that to the user rather than looping.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "sync_inbox"
  }
}

Input Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

A4.8/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only declare readOnlyHint=false and openWorldHint=true; the description carries the real behavioral burden: the action is queued into a cloud-browser workflow, returns an immediate {status, pendingReason, workflowId, operationName, message} snapshot, and may take minutes. It further decodes pendingReason values ('queued' vs 'outsideWorkingHours'), explains that working-hours parking can last until the next business day, and warns that retrying duplicates queued work — none of which is inferable from the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Purpose and the pre-read recommendation are front-loaded, and the workflow/pendingReason paragraphs are dense but each sentence changes how an agent should act. It runs long for a zero-parameter tool and the generic async-workflow mechanics are verbose enough that some tightening is possible, but nothing is filler.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a no-parameter, no-output-schema tool that triggers an asynchronous job, the description supplies everything needed to call it once, interpret the pending snapshot, and retrieve the result without duplicate submissions. No output schema exists, yet the return shape is still described inline.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool takes zero parameters, so there is no parameter meaning to add and the baseline of 4 applies. The description does not waste space restating an empty schema, which is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The opening states a specific verb and resource — enable whole-inbox monitoring so incoming conversations can be polled with get_inbox — and names the sibling tool that consumes the result. An agent can distinguish it from get_inbox and sync_conversation without opening any schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives explicit timing ('Recommended first step before reading messages', 'Run once per account, before sending messages whose replies you want to read'), an exclusion ('only messages that arrive after it is enabled are captured'), a follow-up path (get_workflow_result with workflowId and operationName), and a prohibition (do not retry while a workflow is running).

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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