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lemlist_launch_lead

Launch a lead held for manual review.

Only relevant for a campaign with review-before-send enabled — such a campaign holds a newly created lead in review until launched (counted in the campaign's reviewedCount; the lead's isPaused stays false). Returns {"ok": true} on success; raises with a lemlist error code if it can't launch (already launched, paused, no sender available, invalid AI variable, campaign step errors…).

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "lead_id": "<lead_id>"
    },
    "name": "lemlist_launch_lead"
  }
}

Input Schema

NameRequiredDescriptionDefault
_orgNoOrg (id) de CET APPEL. `oto_list_orgs()`.
_groupNoÉquipe (id) de CET APPEL, sous son org parente.
_run_idNoOBLIGATOIRE à chaque appel dès `run_start` ou `data_claim_next` : sans lui, l'écriture sur une ligne réservée est refusée. Hérité seulement si le serveur tient un run actif — n'y compte pas.
lead_idYes
_projectNoProjet (id) de CET APPEL — jeton PRIMAIRE. `oto_project(op='list')`.
_instanceNoInstance de connecteur PRÉCISE (un credential exact). `oto_instance(op='list')`.

Schema Changelog

Changes observed during successful MCP inspections.

No schema history has been recorded yet.

TDQS

A4.2/5.0
Behavior4/5

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

With no annotations, the description carries the full behavioral burden and does well: it explains the review state, `reviewedCount`, that `isPaused` stays false, the success return of `{"ok": true}`, and representative failure conditions. It does not cover permission requirements or the precise downstream effect of launching, such as whether the first message is sent immediately, so it falls short of complete transparency.

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

Conciseness5/5

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

The description is front-loaded, uses three tight sentences, and every sentence contributes useful information: purpose, eligibility condition, and return/error behavior. There is no filler or repeated schema content.

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

Completeness4/5

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

For a mutation tool with no annotations and no output schema, the description is largely complete: it explains the review context, success return, and error scenarios. It leaves out some operational details such as auth or permission constraints, but nothing critical to selecting and invoking the tool is missing.

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

Parameters3/5

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

Schema description coverage is high at 83%, so the schema already documents most parameters. The description does not add specific meaning about `lead_id` or clarify its relationship to the review campaign, so the baseline of 3 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 description states a specific verb and resource: 'Launch a lead held for manual review.' It clearly identifies the operation as distinct from creating, fetching, or enriching a lead, so an agent can distinguish it from siblings such as lemlist_create_lead or lemlist_lead.

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

Usage Guidelines4/5

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

It gives a clear usage condition: the tool is only relevant for campaigns with review-before-send enabled, where a newly created lead is held until launched. It does not explicitly name alternative tools or describe the full workflow, but the key when-to-use context is unambiguous.

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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