diff --git a/cdsmcp/AGENTS.md b/cdsmcp/AGENTS.md
index 474b66b..79fa631 100644
--- a/cdsmcp/AGENTS.md
+++ b/cdsmcp/AGENTS.md
@@ -30,6 +30,20 @@ This folder contains the VMware/vCenter + MigrateOps runbook for CDS MCP workflo
 - Unless user explicitly asks otherwise, scope VM lookup/list responses to cluster `QACL-ATVMCypressONLY`.
 - For vCenter VM lookup requests, always include datastore name and VM notes/annotation in the response.
 
+## VM Disk And FC Assignment Requirement
+- For requests to assign disks and PCI passthrough FC adapters to a VM, use the workflow in `esxvm-guide.md`.
+- Always verify the VM, live ESXi host, and datastore first.
+- Default expected host is `192.168.1.165`, but verify live placement before planning.
+- Unless the operator explicitly specifies alternatives, default to planning these FC adapters:
+- `vmhba7` (`0000:85:00.0`)
+- `vmhba8` (`0000:85:00.1`)
+- Unless the operator explicitly specifies alternatives, default to planning these existing datastore disks:
+- `atvm-DISK_1.vmdk`
+- `atvm-DISK_2.vmdk`
+- The disks must be located in the same datastore as the VM under the `atvm-DISKS` directory.
+- If the default or operator-specified adapters or disks are missing, do nothing and report that no assignment will be performed.
+- Always provide a read-only summary of findings and planned assignment, then wait for explicit approval before any change.
+
 ## Update Rules
 - Update `esxvm-guide.md` only when workflow/rules/default behavior changes.
 - Update `esxvm-runs.md` only when a run reveals a new learning/failure pattern/required check.
diff --git a/cdsmcp/esxvm-guide.md b/cdsmcp/esxvm-guide.md
index 8b2a4e0..bcdf1b0 100644
--- a/cdsmcp/esxvm-guide.md
+++ b/cdsmcp/esxvm-guide.md
@@ -41,6 +41,32 @@ This file is for workflow guidance only. Do not add specific run examples here.
 - VM notes/annotation
 - include power state and IP when available
 
+## VM Disk And FC Assignment Workflow
+- When asked to assign existing disks and PCI passthrough FC adapters to a specified VM, treat the request as a two-step workflow:
+- first gather and report findings,
+- then wait for explicit approval before making any changes.
+- Always log into vCenter `192.168.0.201`.
+- Find the specified VM and verify the ESXi host it is currently running on.
+- Default expected ESXi host is `192.168.1.165`, but always verify the live host before planning changes.
+- Always identify and report the datastore where the VM is stored before planning disk attachment.
+- Unless the operator explicitly specifies alternatives, default to these PCI passthrough FC adapters:
+- `vmhba7` (`0000:85:00.0`)
+- `vmhba8` (`0000:85:00.1`)
+- Do not substitute any other PCI FC passthrough adapters if either default or operator-specified adapter cannot be found.
+- Unless the operator explicitly specifies alternatives, default to these existing disks from the VM's datastore under the `atvm-DISKS` directory:
+- `atvm-DISK_1.vmdk`
+- `atvm-DISK_2.vmdk`
+- Do not substitute any other disks if either default or operator-specified disk cannot be found.
+- If the specified adapters or specified disks cannot be found, do nothing and report that nothing will be assigned.
+- Before any assignment action, always provide a summary of:
+- the VM found,
+- the ESXi host,
+- the datastore,
+- whether `vmhba7` and `vmhba8` were found and are usable,
+- whether `atvm-DISK_1.vmdk` and `atvm-DISK_2.vmdk` were found under `atvm-DISKS`,
+- exactly what would be assigned.
+- Never perform the assignment step until the operator explicitly approves after seeing that summary.
+
 ## Common VM Credentials
 - Username: `root`
 - Password: `cdsi2012`