GTM API / Endorse skills

Endorse a target person's skills from this account (warm-up / engagement action). Outward action on LinkedIn. Contract: - MCP tool endorse_linkedin_account_skill, registry package mcp.linkedin/linkedin_accounts, mount linkedin.accounts. - Operation action, response envelope action. - Flags: dangerous: the MCP layer gates it behind a preview/commit token, and the effect cannot be undone through this API; paced: a call spends the endorse_skills smart-limit bucket of the account it runs on, and calls of one bucket are spaced per account. A short wait is slept by the server; a longer one answers 429 rate_limited with context.retry_after, and the same call succeeds from that moment. Parallel calls on one account queue behind each other.