diff --git a/cogs/basic.py b/cogs/basic.py
index 2cef409..b59b5fe 100644
--- a/cogs/basic.py
+++ b/cogs/basic.py
@@ -5,11 +5,11 @@ class Basic(commands.Cog):
     def __init__(self, bot):
         self.bot = bot
 
-    @discord.slash_command()
+    @discord.slash_command(description="Greets the world.")
     async def sayhello(self, ctx):
         await ctx.respond('Hello world!')
 
-    @discord.slash_command()
+    @discord.slash_command(description="Sends the bot's latency.")
     async def ping(self, ctx):
         await ctx.respond('My ping is {:.0f}ms'.format(self.bot.latency*1000), ephemeral=True)
 
diff --git a/cogs/ksp.py b/cogs/ksp.py
index 6ca3dd6..e452dda 100644
--- a/cogs/ksp.py
+++ b/cogs/ksp.py
@@ -6,8 +6,8 @@ class Ksp(commands.Cog):
     def __init__(self, bot):
         self.bot = bot
 
-    @discord.slash_command()
-    async def task(self, ctx, task_code):
+    @discord.slash_command(description="Generates urls for given task.")
+    async def task(self, ctx, task_code: str):
         await ctx.respond(
             f'**{task_code}**\n'
             f'Task: {task_link(task_code, solution=False)}\n'
@@ -15,7 +15,7 @@ class Ksp(commands.Cog):
             ephemeral=True
         )
     
-    @discord.slash_command()
+    @discord.slash_command(description="Shows deadlines of currently running series.")
     async def deadlines(self, ctx):
         a_deadlines = active_deadlines()
         if len(a_deadlines) == 0:
diff --git a/cogs/roles.py b/cogs/roles.py
index b91d9ee..e0c87a0 100644
--- a/cogs/roles.py
+++ b/cogs/roles.py
@@ -11,11 +11,14 @@ class Roles(commands.Cog):
 
     secret_roles = discord.SlashCommandGroup(
         "secretroles",
+        "Commands for management of secret roles.",
         checks=[commands.has_permissions(manage_roles=True)]
     )
 
-    @secret_roles.command()
-    async def add(self, ctx, role: discord.role.Role, password: str):
+    @secret_roles.command(description="Adds a new secret role.")
+    @discord.option("role", discord.role.Role, description="Role locked behind a password.")
+    @discord.option("password", str, description="Password for given role.")
+    async def add(self, ctx, role, password):
         roles = data.load_data(ROLES_JSON)
         if password in roles["secret_roles"]:
             return await ctx.respond(f"Password ``{password}`` is already used.", ephemeral=True)
@@ -24,7 +27,7 @@ class Roles(commands.Cog):
         data.dump_data(ROLES_JSON, roles)
         return await ctx.respond(f"Secret role {role.mention} added with password {password}.", ephemeral=True)
     
-    @secret_roles.command()
+    @secret_roles.command(description="Lists all passwords and their secret roles")
     async def list(self, ctx):
         roles = data.load_data(ROLES_JSON)
         if len(roles["secret_roles"]) == 0:
@@ -35,8 +38,9 @@ class Roles(commands.Cog):
             msg += f"``{passwd}``: {role.mention}\n"
         return await ctx.respond(msg, ephemeral=True)
     
-    @secret_roles.command()
-    async def delete(self, ctx, password: str):
+    @secret_roles.command(description="Deletes given password and its secret role.")
+    @discord.option("password", str, description="Password to be deleted.")
+    async def delete(self, ctx, password):
         roles = data.load_data(ROLES_JSON)
         if password not in roles["secret_roles"]:
             return await ctx.respond(f"Role with passowrd {password} does not exist.", ephemeral=True)
@@ -49,9 +53,9 @@ class Roles(commands.Cog):
             ephemeral=True
         )
 
-
-    @discord.slash_command()
-    async def secretrole(self, ctx, password: str):
+    @discord.slash_command(description="Gives a secret role locked by a password.")
+    @discord.option("password", str, description="Password for secret role.")
+    async def secretrole(self, ctx, password):
         roles = data.load_data(ROLES_JSON)
         if password in roles["secret_roles"]:
             author = ctx.author